Mammalian proteinases; oxidoreductases; related reagents

ABSTRACT

Nucleic acids encoding various proteases, from a mammal, reagents related thereto, including specific antibodies, and purified proteins are described. Methods of using said reagents and related diagnostic kits are also provided.

FIELD OF THE INVENTION

The present invention contemplates compositions related to proteins from animals, e.g., mammals, which function as proteinases; or oxidoreductases. In particular, it provides nucleic acids which encode, antibodies to, and proteins which exhibit biological functions, e.g., capacity to degrade proteinaceous substrates or serve as oxidoreductases.

BACKGROUND OF THE INVENTION

The proteases are a very broad group of enzymes which carry out an enzymatic function of hydrolysing a peptide bond. Within the group, there is a wide range of substrate specificities for the amino acids adjacent the cleavage sites. Proteases are typically categorized on the basis of their catalytic mecahnisms, e.g., based upon studies of their active sites, or by the effects of pH. Four main categories of proteases are serine proteinases, sulfhydryl proteases, acid proteases, and metalloproteases. They may also be classified according to their cleavage sites, e.g., endoproteases, amino peptidases, or carboxy peptidases.

Proteases have traditionally held a large share of the industrial enzyme market. Proteases are used in many industrial processes, including in detergents and cleaning products, e.g., to degrade protein materials such as blood and stains, in leather production, e.g., to remove hair, in baking, e.g., to break down glutens, in flavorings, e.g., soy sauce, in meat tenderizing, e.g., to break down collagen, in gelatin or food supplement production, in the textile industry, in waste treatment, and in the photographic industry. See, e.g., Gusek (1991) Inform 1:14-18; Zamost, et al. (1996) J. Industrial Microbiol. 8:71-82; James and Simpson (1996) CRC Critical Reviews in Food Science and Nutrition 36:437-463; Teichgraeber, et al. (1993) Trends in Food Science and Technology 4:145-149; Tjwan, et al. (1993) J. Dairy Research 60:269-286; Haard (1992) J. Aquatic Food Product Technology 1:17-35; van Dijk (1995) Laundry and Cleaning News 21:32-33; Nolte, et al. (1996) J. Textile Institute 87:212-226; Chikkodi, et al. (1995) Textile Res. J. 65:564-569; and Shih (1993) Poultry Science 72:1617-1620.

Oxidoreductases are involved in oxidation and reduction reactions, and have important functions, e.g., in oxidative phosphorylation. These enzymes are important in electron transport and general aerobic metabolism, and in many cases are associated with the mitochondrial membranes. In various circumstances, it may be useful to modulate oxidoreductase reactions to slow down or increase energy metabolism, e.g., in a cell or organ.

While there are many uses for proteases, there is always the need for a more active protease under various specific conditions. Similarly, regulation of oxidoreduction may be important. Alternatively, the distribution of these gene products may be useful as markers for specific cell or tissue types. There is a need for new proteinases or oxidoreductase enzymes of differing properties, specificities, and activities.

SUMMARY OF THE INVENTION

The present invention provides a binding compound comprising an antibody binding site which specifically binds to primate BS10.55 protein; or primate YTF03 protein; a nucleic acid comprising sequence encoding at least 12 amino acids of primate BS10.55 protein; or primate YTF03 protein; a substantially pure protein which is specifically recognized by the above antibody binding site; a substantially pure primate BS10.55, or primate YTF03 protein or peptide thereof; and a fusion protein comprising a 30 amino acid sequence portion of primate BS10.55, or primate YTF03 protein sequence.

In certain binding compound embodiments, the antibody binding site is specifically immunoreactive with a protein selected from polypeptides of SEQ ID NO: 2 and 4; is raised against a purified or recombinantly produced primate BS10.55, or primate YTF03 protein; is immunoselected on a substantially purified or recombinantly produced primate BS10.55, or primate YTF03 protein; is in a monoclonal antibody, Fab, or F(ab)2; is detectably labeled; is attached to a solid substrate; is from a rabbit or mouse; binds with a Kd of at least about 300 μM; is fused to another protein segment; is in a chimeric antibody; or is coupled to another chemical moiety.

The invention also provides a method of making an antigen-antibody complex, comprising a step of contacting a primate biological sample to a specific binding antibody described. In preferred embodiments, the method further includes steps to purify the antigen or antibody.

Alternative embodiments provide an antibody binding site wherein the binding site is detected in a biological sample by a method comprising the steps of contacting a binding agent having an affinity for BS10.55 or YTF03 protein with the biological sample; incubating the binding agent with the biological sample to form a binding agent:BS10.55 or binding agent:YTF03 protein complex; and detecting the complex. In certain embodiments, the biological sample is human, and the binding agent is an antibody.

The invention also provides kits containing a composition described above and instructional material for the use of the composition; or segregation of the composition into a container. Typically, the kit is used to make a qualitative or quantitative analysis.

The invention also embraces a cell comprising an antibody described above; a cell transfected with a nucleic acid described above; or a cell comprising a fusion protein described above.

In nucleic acid embodiments, the nucleic acid may encode a polypeptide which specifically binds an antibody generated against an immunogen selected from the group consisting of the mature polypeptides of SEQ ID NO: 2 and 4. Alternatively, the nucleic acid may encode at least 12 amino acids of SEQ ID NO: 2 or SEQ ID NO: 4; comprise sequence of at least about 39 nucleotides selected from protein coding portions of SEQ ID NO: 1 or 3; hybridize to SEQ ID NO: 1 or 3 under stringent wash conditions of at least 45° C. and less than about 150 mM salt; comprise sequence made by a synthetic method; be an expression vector; be detectably labeled; be attached to a solid substrate; be from human; bind with a Kd of at least about 300 μM; be fused to another nucleic acid segment; be coupled to another chemical moiety; be operably associated with promoter, ribosome binding site, or poly-A addition site; be a PCR product; be transformed into a cell, including a bacterial cell; be in a sterile composition; be capable of selectively hybridizing to a nucleic acid encoding a BS10.55, or YTF03 protein; comprise a natural sequence; comprise a mature protein coding segment of SEQ ID NO: 1 or 3; encode proteolytically active portion of BS10.55; encode an oxidoreductive active portion of YTF03; be detected in a biological sample by a method comprising: contacting a biological sample with a nucleic acid probe capable of selectively hybridizing to said nucleic acid, incubating the nucleic acid probe with the biological sample to form a hybrid of the nucleic acid probe with complementary nucleic acid sequences present in the biological sample; and determining the extent of hybridization of the nucleic acid probe to the complementary nucleic acid sequences, including the method where the nucleic acid probe is capable of hybridizing to a nucleic acid encoding a protein selected from the group consisting of the mature polypeptides of SEQ ID NO 2 and 4.

In protein or polypeptide embodiments, the proteins may bind with a Kd of at least about 300 μM to an antibody generated against an immunogen of the polypeptides of SEQ) ID NO: 2 or 4; be immunoselected on an antibody which selectively binds a polypeptide of SEQ ID NO: 2 or 4; comprise sequence of at least 12 contiguous residues of SEQ ID NO: 2 or 4; exhibit a post-translational modification pattern distinct from natural BS10.55, or YTF03; be 3-fold or fewer substituted from natural sequence; be recombinantly produced; be denatured; have sequence of full length natural polypeptide; be detectably labeled; be attached to a solid substrate; be from human; be in a sterile composition; be fused to another protein segment; be coupled to another chemical moiety; comprise at least a fragment of at least 32 amino acid residues from a human BS10.55, or human YTF03 protein; comprise mature polypeptide sequence selected from the group consisting of SEQ ID NO 2 and 4; be a soluble protein; be a naturally occurring protein; be a proteolytically active portion of BS10.55; or be an oxidoreductive active portion of YTF03.

The invention also provides an isolated protein which specifically binds to an antibody generated against an immunogen selected from the group consisting of the full length polypeptides of SEQ ID NO: 2 or 4. Preferably such protein binds to the antibody with a Kd of at least about 300 μM; is immunoselected on an antibody which selectively binds a polypeptide of.SEQ ID NO: 2 or 4; comprises sequence of at least 12 contiguous residues of SEQ ID NO: 2 or 4; exhibits a post-translational modification pattern distinct from natural BS10.55, or YTF03; is 3-fold or fewer substituted from natural sequence; is recombinantly produced; is denatured; has sequence of full length natural polypeptide; is detectably labeled; is attached to a solid substrate; is from human; is in a sterile composition; is fused to another protein segment; is coupled to another chemical moiety; comprises at least a fragment of at least 32 amino acid residues from a human BS10.55, or human YTF03 protein; comprises mature polypeptide sequence selected from the group consisting of SEQ ID NO 2 and 4; is a soluble protein; comprises a proteolytic activity of BS10.55; or comprises an oxidoreductive activity of YTF03.

In certain other embodiments, the invention embraces a fusion protein described above, which comprises sequence from an enzymatically active portion of SEQ ID NO: 2 or 4. Preferably such protein binds with a Kd of at least about 300 μM to an antibody generated against an immunogen having sequence of a polypeptide of SEQ ID NO. 2 or 4; is immunoselected on an antibody which selectively binds a polypeptide of SEQ ID NO: 2 or 4; comprises sequence of at least 12 contiguous residues of SEQ ID NO: 2 or 4; is recombinantly produced; is denatured; has sequence of full length natural polypeptide; is detectably labeled; is attached to a solid substrate; comprises sequence from human; is in a sterile composition; is fused to another protein segment; is coupled to another chemical moiety; comprises at least a fragment of at least 32 amino acid residues from a human BS10.55, or human YTF03 protein; comprises mature polypeptide sequence selected from the group consisting of SEQ ID NO 2 and 4; is a soluble protein; comprises a proteolytic activity of BS10.55; or comprises an oxidoreductive activity of YTF03.

The invention also provides a substantially pure protein described above which comprises a proteolytic activity of BS10.55; or an oxidoreductive activity of YTF03.

A method of modulating physiology or development of a cell comprising contacting said cell with said compositions is provided.

Likewise, the invention provides a binding compound comprising an antibody binding site which specifically binds to primate APD08; a nucleic acid comprising sequence encoding at least 12 amino acids of primate APD08; a substantially pure protein which is specifically recognized by the antibody binding site; a substantially pure primate APD08 protein or peptide thereof, and; a fusion protein comprising a 30 amino acid sequence portion of primate APD08 protein sequence.

DETAILED DESCRIPTION

OUTLINE

I. General

II. Definitions

III. Nucleic Acids

IV. Making BS10.55 or YTF03 Protein

V. Antibodies; binding compounds

a. Antibody Production

b. Immunoassays

VI. Purified BS10.55 and YTF03 Protein

VII. Physical Variants

VIII. Binding Agent: BS10.55 or YTF03 Protein Complexes

IX. Functional Variants

X. Uses

XI. Kits

XII. Substrate Identification

I. General

The present invention provides DNA sequences encoding mammalian proteins which exhibit structural properties or motifs characteristic of a protease; or an oxidoreductase. The proteins described herein are designated BS10.55 and YTF03. See Tables 1 and 2.

The descriptions below are directed, for exemplary purposes, to primate embodiments, e.g., human, but are likewise applicable to related embodiments from other, e.g., natural, sources. These sources should, where appropriate, include various vertebrates, typically warm blooded animals, e.g., birds and mammals, particularly domestic animals, and primates.

                                      TABLE 1                                      __________________________________________________________________________     Human BS10.55 nucleotide and predicted amino sequence. SEQ                       ID NO: 1 and 2. The initiation methionine indicates one possible start        codon, though a second, perhaps more probable, initiation codon encodes       the                                                                              methionine at position 14. A hydrophobic region follows the latter,          which                                                                            may be a signal sequence running, e.g., to about Ala30; and a mature          processed form may begin in the range of 27-33, probably Ile31.               __________________________________________________________________________                                              CGCCCGGGCA                                                                     GGTGAGAAAT TGGAGAAGAT AAAACTGGAC                                              ACTGGGGAGA CCACAACTTC   60                                                       - ATG CTG CGT GGG ATC TCC CAG                                                CTA CCT GCA GTG GCC ACC ATG TCT                                                TGG  108                                 Met Leu Arg Gly Ile Ser Gln Leu Pro Ala Val Ala Thr Met Ser Trp                                                         1               5                                                               10                  15                                                       - GTC CTG CTG CCT GTA CTT TGG                                                CTC ATT GTT CAA ACT CAA GCA ATA                                                GCC  156                                 Val Leu Leu Pro Val Leu Trp Leu Ile Val Gln Thr Gln Ala Ile Ala                                                                    20                                                               25                  30                    - ATA AAC CAA ACA CCT GAA TTA ACG CTC CAT GAA ATA GTT TGT CCT AAA  204        Ile Lys Gln Thr Pro Glu Leu Thr Leu His Glu Ile Val Cys Pro Lys                                                                35                  40                                                               45                        - AAA CTT CAC ATT TTA CAC AAA AGA GAG ATC AAG AAC AAC CAG ACA GAA  252        Lys Leu His Ile Leu His Lys Arg Glu Ile Lys Asn Asn Gln Thr Glu                                                            50                  55                                                               60                            - AAG CAT GGC AAA GAG GAA AGG TAT GAA CCT GAA GTT CAA TAT CAG ATG  300        Lys His Gly Lys Glu Glu Arg Tyr Glu Pro Glu Val Gln Tyr Gln Met                                                        65                  70                                                               75                  80                                                   - ATC TTA AAT GGA GAA GAA ATC                                                ATT CTC TCC CTA CAA AAA ACC AAG                                                CAC  348                                 Ile Leu Asn Gly Glu Glu Ile Ile Leu Ser Leu Gln Lys Thr Lys His                                                                        85                                                               90                  95                                                       - CTC CTG GGG CCA GAC TAC ACT                                                GAA ACA TTG TAC TCA CCC AGA GGA                                                GAG  396                                 Leu Leu Gly Pro Asp Tyr Thr Glu Thr Leu Tyr Ser Pro Arg Gly Glu                                                                   100                                                               105                 110                   - GAA ATT ACC ACG AAA CCT GAG AAC ATG GAA CAC TGT TAC TAT AAA GGA  444        Glu Ile Thr Thr Lys Pro Glu Asn Met Glu His Cys Tyr Tyr Lys Gly                                                               115                 120                                                              125                        - AAC ATC CTA AAT GAA AAG AAT TCT GTT GCC AGC ATC AGT ACT TGT GAC  492        Asn Ile Leu Asn Glu Lys Asn Ser Val Ala Ser Ile Ser Thr Cys Asp                                                           130                 135                                                              140                            - GGG TTG AGA GGA TAC TTC ACA CAT CAT CAC CAA AGA TAC CAG ATA AAA  540        Gly Leu Arg Gly Tyr Phe Thr His His His Gln Arg Tyr Gln Ile Lys                                                       145                 150                                                              155                 160                                                   - CCT CTG AAA AGC ACA GAC GAG                                                AAA GAA CAT GCC GTC TTT ACA TCT                                                AAC  588                                 Pro Leu Lys Ser Thr Asp Glu Lys Glu His Ala Val Phe Thr Ser Asn                                                                       165                                                              170                 175                                                       - CAG GAG GAA CAA GAC CCA GCT                                                AAC CAC ACA TGT GGT GTG AAG AGC                                                ACT  636                                 Gln Glu Glu Gln Asp Pro Ala Asn His Thr Cys Gly Val Lys Ser Thr                                                                   180                                                               185                 190                   - GAC GGG AAA CAA GGC CCA ATT CGA ATC TCT AGA TCA CTC AAA AGC CCA  684        Asp Gly Lys Gln Gly Pro Ile Arg Ile Ser Arg Ser Leu Lys Ser Pro                                                               195                 200                                                              205                        - GAG AAA GAA GAC TTT CTT CGC GCA CAG AAA TAC ATT GAT CTC TAT TTG  732        Glu Lys Glu Asp Phe Leu Arg Ala Gln Lys Tyr Ile Asp Leu Tyr Leu                                                           210                 215                                                              220                            - GTG CTG GAT AAT GCC TTT TAT AAG AAC TAT AAT GAG AAT CTA ACT CTG  780        Val Leu Asp Asn Ala Phe Tyr Lys Asn Tyr Asn Glu Asn Leu Thr Leu                                                       225                 230                                                              235                 240                                                   - ATA AGA AGC TTT GTG TTT GAT                                                GTG ATG AAC CTA CTC AAT GTC ATA                                                TAT  828                                 Ile Arg Ser Phe Val Phe Asp Val Met Asn Leu Leu Asn Val Ile Tyr                                                                       245                                                              250                 255                                                       - AAC ACC ATA GAT GTT CAA GTG                                                GCC TTG GTA GGT ATG GAA ATC TGG                                                TCT  876                                 Asn Thr Ile Asp Val Gln Val Ala Leu Val Gly Met Glu Ile Trp Ser                                                                   260                                                               265                 270                   - GAT GGC GAT AAG ATA AAG GTG GTG CCC AGC GCA AGC ACC ACG TTT GAC  924        Asp Gly Asp Lys Ile Lys Val Va1 Pro Ser Ala Ser Thr Thr Phe Asp                                                               275                 280                                                              285                        - AAC TTC CTG AGA TGG CAC AGT TCT AAC CCG GGG AAA AAG ATC CAC GAC  972        Asn Phe Leu Arg Trp His Ser Ser Asn Pro Gly Lys Lys Ile His Asp                                                           290                 295                                                              300                            - CAT GCT CAG CTT CTC AGC GGG ATT AGC TTC AAC AAT CGA CGT GTG GGA 1020        His Ala Gln Leu Leu Ser Gly Ile Ser Phe Asn Asn Arg Arg Val Gly                                                       305                 310                                                              315                 320                                                   - CTG GCA GCT TCA AAT TCC TTG                                                TGT TCC CCA TCT TCG GTT GCT GTT                                                ATT 1068                                 Leu Ala Ala Ser Asn Ser Leu Cys Ser Pro Ser Ser Val Ala Val Ile                                                                       325                                                              330                 335                                                       - GAG GCT AAA AAA AAG AAT AAT                                                GTG GCT CTT GTA GGA GTG ATG TCA                                                CAT 1116                                 Glu Ala Lys Lys Lys Asn Asn Val Ala Leu Val Gly Val Met Ser His                                                                   340                                                               345                 350                   - GAG CTG GGC CAT GTC CTT GGT ATG CCT GAT GTT CCA TTC AAC ACC AAG 1164        Glu Leu Gly His Val Leu Gly Met Pro Asp Val Pro Phe Asn Thr Lys                                                               355                 360                                                              365                        - TGT CCC TCT GGC AGT TGT GTG ATG AAT CAG TAT CTG AGT TCA AAA TTC 1212        Cys Pro Ser Gly Ser Cys Val Met Asn Gln Tyr Leu Ser Ser Lys Phe                                                           370                 375                                                              380                            - CCA AAG GAT TTC AGT ACA TCT TGC CGT GCA CAT TTT GAA AGA TAC CTT 1260        Pro Lys Asp Phe Ser Thr Ser Cys Arg Ala His Phe Glu Arg Tyr Leu                                                       385                 390                                                              395                 400                                                   - TTA TCT CAG AAA CCA AAG TGC                                                CTG CTG CAA GCA CCT ATT CCT ACA                                                AAT 1308                                 Leu Ser Gln Lys Pro Lys Cys Leu Leu G1n Ala Pro Ile Pro Thr Asn                                                                       405                                                              410                 415                                                       - ATA ATG ACA ACA CCA GTG TGT                                                GGG AAC CAC CTT CTA GAA GTG GGA                                                GAA 1356                                 Ile Met Thr Thr Pro Val Cys Gly Asn His Leu Leu Glu Val Gly Glu                                                                   420                                                               425                 430                   - GAC TGT GAT TGT GGC TCT CCT AAG GAG TGT ACC AGT CTC TGC TGT GAA 1404        Asp Cys Asp Cys Gly Ser Pro Lys Glu Cys Thr Ser Leu Cys Cys Glu                                                               435                 440                                                              445                        - GCC CTA ACG TGT AAA CTG AAG CCT GGA ACT GAT TGC GGA GGA GAT GCT 1452        Ala Leu Thr Cys Lys Leu Lys Pro Gly Thr Asp Cys Gly Gly Asp Ala                                                           450                 455                                                              460                            - CCA AAC CAT ACC ACA GAG TGA ATCCAAAGTC TGCTTCACTG AGATGCTACC 1503                                                  Pro Asn His Thr Thr Glu  *                                                     465                 470                  - TTGCCAGGAC AAGAACCAAG AACTCTAACT GTCCCAGGAA TCTTGTGAAT TTTCACCCAT                                                 1563                                      - AATGGTCTTT CACTTGTCAT TCTACTTTCT ATATTGTTAT CAGTCCAGGA AACAGGTAAA                                                 1623                                      - CAGATGTAAT TAGAGACATT GGCTCTTTGT TTAGGCCTAA TCTTTCTTTT TACTTTTTTT                                                 1683                                      - TTTCTTTTTT CTTTTTTTTT AAAGATCATG AATTTGTGAC TTAGTTCTGC CCTTTGGAGA                                                 1743                                      - ACAAAAGAAA GCAGTCTTCC ATCAAATCAC CTTAAAATGC ACGGCTAAAC TATTCAGAGT                                                 1803                                      - TAACACTCCA GAATTGTTAA ATTACAAGTA CTATGCTTTA ATGCTTCTTT CATCTTACTA                                                 1863                                      - GTATGGCCTA TAAAAAAAAT AATACCACTT GATGGGTGAA GGCTTTGGCA ATAGAAAGAA                                                 1923                                      - GAATAGAATT CAGGTTTTAT GTTATTCCTC TGTGTTCACT TCGCCTTGCT CTTGAAAGTG                                                 1983                                      - CAGTATTTTT CTACATCATG TCGAGAATGA TTCAATGTAA ATATTTTTCA TTTTATCATG                                                 2043                                      - TATATCCTAT ACACACATCT CCTTCATCAT CATATATGAA GTTTATTTTG AGAAGTCTAC                                                 2103                                      - ATTGCTTACA TTTTAATTGA GCCAGCAAAG AAGGCTTAAT GATTTATTGA ACCATAATGT                                                 2163                                      - CAATAAAAAC ACAACTTTTG AGGCAAAAAA AAAAAAAAAA AAAAAAAAAA AAAAAAAAAA                                                 2223                                      - AAAAAAAAAA AAAAAAAAAG AAAAAAAAAA AAAAAAAAAA AAAGACCTGC CCGGGCG            __________________________________________________________________________                                             2280                              

                                      TABLE 2                                      __________________________________________________________________________     Human YTF03 monoamine oxiase-like gene nucleic acid and predicted               amino acid sequence. SEQ ID NO: 3 and 4. The predicted signal sequence         would run, e.g., to about gln22; and a mature processed form may begin        in                                                                               the range of 18-25, probably asp23. Putative transmembrane segments run       from about val62 to leu78; and ala272 to ala289. A mitochondrial               localization motif is near gln22.                                             __________________________________________________________________________                                              AGTGGAGAGG                                                                     ACCGCGCTGT CCTGCTGTCA CCAAGAGCTG                                              GAGACACCAT CTCCCACCGA   60                                                       - GAGTC ATG GCC CCA TTG GCC CTG                                              CAC CTC CTC GTC CTC GTC CCC ATC                                                107                                            Met Ala Pro Leu Ala Leu His Leu Leu Val Leu Val Pro Ile                          1                   5                  10                               - CTC CTC AGC CTG GTG GCC TCC CAG GAC TGG AAG GCT GAA CGC AGC CAA  155        Leu Leu Ser Leu Val Ala Ser Gln Asp Trp Lys Ala Glu Arg Ser Gln                                                        15                  20                                                               25                  30                                                   - GAC CCC TTC GAG AAA TGC ATG                                                CAG GAT CCT GAC TAT GAG CAG CTG                                                CTC  203                                 Asp Pro Phe Glu Lys Cys Met Gln Asp Pro Asp Tyr Glu Gln Leu Leu                                                                        35                                                               40                  45                                                       - AAG GTG GTG ACC TGG GGG CTC                                                AAT CGG ACC CTG AAG CCC CAG AGG                                                GTG  251                                 Lys Val Val Thr Trp Gly Leu Asn Arg Thr Leu Lys Pro Gln Arg Val                                                                    50                                                               55                  60                    - ATT GTG GTT GGC GCT GGT GTG GCC GGG CTG GTG GCC GCC AAG GTG CTC  299        Ile Val Val Gly Ala Gly Val Ala Gly Leu Val Ala Ala Lys Val Leu                                                                65                  70                                                               75                        - AGC GAT GCT GGA CAC AAG GTC ACC ATC CTG GAG GCA GAT AAC AGG ATC  347        Ser Asp Ala Gly His Lys Val Thr Ile Leu Glu Ala Asp Asn Arg Ile                                                            80                  85                                                               90                            - GGG GGC CGC ATC TTC ACC TAC CGG GAC CAG AAC ACG GGC TGG ATT GGG  395        Gly Gly Arg Ile Phe Thr Tyr Arg Asp Gln Asn Thr Gly Trp Ile Gly                                                        95                 100                                                              105                 110                                                   - GAG CTG GGA GCC ATG CGC ATG                                                CCC AGC TCT CAC AGG ATC CTC CAC                                                AAG  443                                 Glu Leu Gly Ala Met Arg Met Pro Ser Ser His Arg Ile Leu His Lys                                                                       115                                                              120                 125                                                       - CTC TGC CAG GGC CTG GGG CTC                                                AAC CTG ACC AAG TTC ACC CAG TAC                                                GAC  491                                 Leu Cys Gln Gly Leu Gly Leu Asn Leu Thr Lys Phe Thr Gln Tyr Asp                                                                   130                                                               135                 140                   - AAG AAC ACG TGG ACG GAG GTG CAC GAA GTG AAG CTG CGC AAC TAT GTG  539        Lys Asn Thr Trp Thr Glu Val His Glu Val Lys Leu Arg Asn Tyr Val                                                               145                 150                                                              155                        - GTG GAG AAG GTG CCC GAG AAG CTG GGC TAC GCC TTG CGT CCC CAG GAA  587        Val Glu Lys Val Pro Glu Lys Leu Gly Tyr Ala Leu Arg Pro Gln Glu                                                           160                 165                                                              170                            - AAG GGC CAC TCG CCC GAA GAC ATC TAC CAG ATG GCT CTC AAC CAG GCC  635        Lys Gly His Ser Pro Glu Asp Ile Tyr Gln Met Ala Leu Asn Gln Ala                                                       175                 180                                                              185                 190                                                   - CTC AAA GAC CTC AAG GCA CTG                                                GGC TGC AGA AAG GCG ATG AAG AAG                                                TTT  683                                 Leu Lys Asp Leu Lys Ala Leu Gly Cys Arg Lys Ala Met Lys Lys Phe                                                                       195                                                              200                 205                                                       - GAA AGG CAC ACG CTC TTG GAA                                                TAT CTT CTC GGG GAG GGG AAC CTG                                                AGC  731                                 Glu Arg His Thr Leu Leu Glu Tyr Leu Leu Gly Glu Gly Asn Leu Ser                                                                   210                                                               215                 220                   - CGG CCG GCC GTG CAG CTT CTG GGA GAC GTG ATG TCC GAG GAT GGC TTC  779        Arg Pro Ala Val Gln Leu Leu Gly Asp Val Met Ser Glu Asp Gly Phe                                                               225                 230                                                              235                        - TTC TAT CTC AGC TTC GCC GAG GCC CTC CGG GCC CAC AGC TGC CTC AGC  827        Phe Tyr Leu Ser Phe Ala Glu Ala Leu Arg Ala His Ser Cys Leu Ser                                                           240                 245                                                              250                            - GAC AGA CTC CAG TAC AGC CGC ATC GTG GGT GGC TGG GAC CTG CTG CCG  875        Asp Arg Leu Gln Tyr Ser Arg Ile Val Glu Gly Trp Asp Leu Leu Pro                                                       255                 260                                                              265                 270                                                   - CGC GCG CTG CTG AGC TCG CTG                                                TCC GGG CTT GTG CTG TTG AAC GCG                                                CCC  923                                 Arg Ala Leu Leu Ser Ser Leu Ser Gly Leu Val Leu Leu Asn Ala Pro                                                                       275                                                              280                 285                                                       - GTG GTG GCG ATG ACC CAG GGA                                                CCG CAC GAT GTG CAC GTG CAG ATC                                                GAG  971                                 Val Val Ala Met Thr Gln Gly Pro His Asp Val His Val Gln Ile Glu                                                                   290                                                               295                 300                   - ACC TCT CCC CCG GCG CGG AAT CTG AAG GTG CTG AAG GCC GAC GTG GTG 1019        Thr Ser Pro Pro Ala Arg Asn Leu Lys Val Leu Lys Ala Asp Val Val                                                               305                 310                                                              315                        - CTG CTG ACG GCG AGC GGA CCG GCG GTG AAG CGC ATC ACC TTC TCG CCG 1067        Leu Leu Thr Ala Ser Gly Pro Ala Val Lys Arg Ile Thr Phe Ser Pro                                                           320                 325                                                              330                            - CCG CTG CCC CGC CAC ATG CAG GAG GCG CTG CGG AGG CTG CAC TAC GTG 1115        Pro Leu Pro Arg His Met Gln Glu Ala Leu Arg Arg Leu His Tyr Val                                                       335                 340                                                              345                 350                                                   - CCG GCC ACC AAG GTG TTC CTA                                                AGC TTC CGC AGG CCC TTC TGG CGC                                                GAG 1163                                 Pro Ala Thr Lys Val Phe Leu Ser Phe Arg Arg Pro Phe Trp Arg Glu                                                                       355                                                              360                 365                                                       - GAG CAC ATT GAA GGC GGC CAC                                                TCA AAC ACC GAT CGC CCG TCG CGC                                                ATG 1211                                 Glu His Ile Glu Gly Gly His Ser Asn Thr Asp Arg Pro Ser Arg Met                                                                   370                                                               375                 380                   - ATT TTC TAC CCG CCG CCG CGC GAG GGC GCG CTG CTG CTG GCC TCG TAC 1259        Ile Phe Tyr Pro Pro Pro Arg Glu Gly Ala Leu Leu Leu Ala Ser Tyr                                                               385                 390                                                              395                        - ACG TGG TCG GAC GCG GCG GCA GCG TTC GCC GGC TTG AGC CGG GAA GAG 1307        Thr Trp Ser Asp Ala Ala Ala Ala Phe Ala Gly Leu Ser Arg Glu Glu                                                           400                 405                                                              410                            - GCG TTG CGC TTG GCG CTC GAC GAC GTG GCG GCA TTG CAC GGG CCT GTC 1355        Ala Leu Arg Leu Ala Leu Asp Asp Val Ala Ala Leu His Gly Pro Val                                                       415                 420                                                              425                 430                                                   - GTG CGC CAG CTC TGG GAC GGC                                                ACC GGC GTC GTC AAG CGT TGG GCG                                                GAG 1403                                 Val Arg Gln Leu Trp Asp Gly Thr Gly Val Val Lys Arg Trp Ala Glu                                                                       435                                                              440                 445                                                       - GAC CAG CAC AGC CAG GGT GGC                                                TTT GTG GTA CAG CCG CCG GCG CTC                                                TGG 1451                                 Asp Gln His Ser Gln Gly Gly Phe Val Val Gln Pro Pro Ala Leu Trp                                                                   450                                                               455                 460                   - CAA ACC GAA AAG GAT GAC TGG ACG GTC CCT TAT GGC CGC ATC TAC TTT 1499        Gln Thr Glu Lys Asp Asp Trp Thr Val Pro Tyr Gly Arg Ile Tyr Phe                                                               465                 470                                                              475                        - GCC GGC GAG CAC ACC GCC TAC CCG CAC GGC TGG GTG GAG ACG GCG GTC 1547        Ala Gly Glu His Thr Ala Tyr Pro His Gly Trp Val Glu Thr Ala Val                                                           480                 485                                                              490                            - AAG TCG GCG CTG CGC GCC GCC ATC AAG ATC AAC AGC CGG AAG GGG CCT 1595        Lys Ser Ala Leu Arg Ala Ala Ile Lys Ile Asn Ser Arg Lys Gly Pro                                                       495                 500                                                              505                 510                                                   - GCA TCG GAC ACG GCC AGC CCC                                                GAG GGG CAC GCA TCT GAC ATG GAG                                                GGG 1643                                 Ala Ser Asp Thr Ala Ser Pro Glu Gly His Ala Ser Asp Met Glu Gly                                                                       515                                                              520                 525                                                       - CAG GGG CAT GTG CAT GGG GTG                                                GCC AGC AGC CCC TCG CAT GAC CTG                                                GCA 1691                                 Gln Gly His Val His Gly Val Ala Ser Ser Pro Ser His Asp Leu Ala                                                                   530                                                               535                 540                   - AAG GAA GAA GGC AGC CAC CCT CCA GTC CAA GGC CAG TTA TCT CTC CAA 1739        Lys Glu Glu Gly Ser His Pro Pro Val Gln Gly Gln Leu Ser Leu Gln                                                               545                 550                                                              555                        - AAC ACG ACC CAC ACG AGG ACC TCG CAT TAA AGTATTTTCG G 1780                   Asn Thr Thr His Thr Arg Thr Ser His  *                                             560                 565                                                  __________________________________________________________________________

The proteins of this invention are defined in part by their sequences, and by their physicochemical and biological properties. The biological properties of the human proteases described herein, e.g., human BS10.55, and oxidoreductases, e.g., human YTF03, are defined by their amino acid sequences, and mature sizes. They also should share certain biological enzymatic properties of their respective proteins.

The human protease YTF03 translation product exhibits structural motifs of a member of the metalloproteinase family of proteases, more specifically to a family of disintegrin-metalloproteinases. These proteins, in the latent form, typically possess a prodomain form which masks the catalytic site, which chelates a zinc ion. See Vallee and Auld (1990) Biochemistry 29:5647-5659. The processed mature protein is typically a potent cell-matrix degrading enzyme. See, e.g., Birkedal-Hansen (1990) Proc. Nat'l Acad. Sci. USA 87:5578-5582. Distinct from the family of strictly matrix-metalloproteinases (see, e.g., Birkedal-Hansen, et al. (1993) Crit. Rev. Oral. Biol. Med. 4:197-250), the disintegrin-metalloproteinases comprise, besides the zinc-chelating domain, a 90 amino acid disintegrin cysteine rich domain. See, e.g., Hite, et al. (1992) Biochemistry 31:6203-6211. This domain binds integrin cell adhesion molecules and can disrupt cell-matrix interactions. Gould, et al. (1990) Proc. Soc. Exa. Biol. Med. 195:168-171. It is postulated that the disintegrin moiety supports the catalytic domain in recognizing and specifically cleaving matrix substrates. A large number of disintegrins are found in snake venoms, which inhibit platelet aggregation by competing with fibrinogen for binding to the platelet's glycoprotein IIb-IIa complex. The mammalian disintegrin-metalloproteinases include fertilin α (Blobel, et al. (1992) Nature 356:248-252), meltrin (Yagami-Hiromasa, et al. (1995) Nature 377:652-656), MS2 (Yoshida, et al. (1990) Int. Immunol. 2:585-591), EAP1 (Perry, et al. (1992) Biochem J. 286:671-675), and ADAMTS (Kuno, et al. (1997) J. Biol. Chem. 272:556-562). Fertilin α and meltrin are likely to be membrane proteins and are thought involved in cell-cell fusion via a fusion peptide similar to virus envelope proteins. EAP1 and MS2 also contain a transmembrane spanning region, and ADAMTS comprises thrombospondin motifs. Interestingly, MS2 seems specifically expressed by mouse macrophages but its function is unclear.

BS10.55 contains the zinc binding peptide consensus at residues 352-359 of SEQ ID NO: 2 (His-Glu-Met/Leu-Gly-His-X-X-Gly) and the disintegrin homology lies between SEQ ID NO: 2 residues 430-460 shortly before the end of the open reading frame. The peptide motif at residues 187-189 (Cys-Gly-Val) is characteristic of the prodomain (Hite, et al. (1992) Biochemistry 31:6203-6211). BS10.55 exhibits a hydrophobic region following the second methinone (at 14) at the 5' end of the cDNA sequence, likely to be a signal sequence. This, and the lack of a putative transmembrane region, suggest that this novel disintegrin-metalloproteinases is secreted. Natural substrates for the proteinase may be identified using standard methods. Substrate sequence specificity may be determined, and search for such sequences in databases may identify specific candidates for physiological substrates.

The YTF03 gene was initially found by analysis of clones isolated from germinal center dendritic cells. This cDNA is distantly related to a family of enzymes which include monamine oxidases (MAOs). These proteins are typically mitochondrial outer membrane proteins found in at least two forms and are tissue restricted to, e.g., certain neurons and astrocytes. They generally function to oxidatively deaminate, e.g., vasoactive and neuroactive amines, and are often targets for amphetamines. The YTF03 product does not have the key residues which covalently bind the classical MOA's FAD cofactor, and so it may not exhibit monamine oxidase activity itself. The protein is most closely related to a hypothesized protein from a cyanobacteria, but only slightly more so than to other MAOs. The predicted protein has a convincing leader sequence, though it may have characteristics which suggest association with intracellular membranous compartments like other MAOs. It is evident that the overall structure of the body of the ORF is very strongly conserved. Despite the relatively low homology with its relatives, there is little tolerance for addition/deletion changes (+/-1 residue) in certain regions. This suggests an intricate structural mix of alpha helices and beta sheets. PCR analysis suggests that YTF03 mRNA is expressed mainly in Dendritic Cells (DC) and monocytes, and to a lesser extent in some T cells.

A comparison search versus the GenPep database gave closest match to the sequence ACCESSION 1001515 cyanobacterium Synechocystis sp. hypothetical protein. Viewing the structure, there is fairly believable conservation of helix/sheet patterns, though the cyano ORF has no leader and is a little shortened at the C-terminus.

One of skill will readily recognize that some sequence variations may be tolerated, e.g., conservative substitutions or positions remote from the critical helical structures and remote from the identified or consensus critical active site regions, without altering significantly the biological activity of each respective molecule.

BS10.55 or YTF03 proteins are present in specific cell types, e.g., dendritic cells, and the interaction of the protease with a substrate will be important for mediating various aspects of cellular physiology or development. The cellular types which express messages encoding APG02 and YTF03 suggest that signals important in cell differentiation and development are mediated by them. See, e.g., Gilbert (1991) Developmental Biology (3d ed.) Sinauer Associates, Sunderland, Mass.; Browder, et al. (1991) Developmental Biology (3d ed.) Saunders, Philadelphia, Pa.; Russo, et al. (1992) Develorment: The Molecular Genetic Approach Springer-Verlag, New York, N.Y.; and Wilkins (1993) Genetic Analysis of Animal Development (2d ed.) Wiley-Liss, New York, N.Y. In particular, the proteases may be necessary for the conversion of pro-proteins to proteins, e.g., cytokine or protein precursors to mature forms, or for proper immunological function, e.g., antigen processing and presentation.

II. Definitions

The term "binding composition" refers to molecules that bind with specificity to BS10.55 or YTF03, respectively, e.g., in an antibody-antigen interaction. However, other compounds, e.g., complex associated proteins, may also specifically associate with BS10.55 or YTF03 to the exclusion of other molecules. Typically, the association will be in a natural physiologically relevant protein-protein interaction, either covalent or non-covalent, and may include members of a multiprotein complex, including carrier compounds or dimerization partners. The molecule may be a polymer, or chemical reagent. A functional analog may be a protease with structural modifications, or may be a wholly unrelated molecule, e.g., which has a molecular shape which interacts with the appropriate substrate cleavage determinants.

The term "binding agent:BS10.55 or YTF03 protein complex", as used herein, refers to a complex of a binding agent and a BS10.55 or YTF03 protein that is formed by specific binding of the binding agent to the BS10.55 or YTF03 protein. Specific binding of the binding agent means that the binding agent has a specific binding site that recognizes a site on the BS10.55 or YTF03 protein, typically in the native conformation, but possibly in a denatured conformation, e.g., a Western blot. For example, antibodies raised to a BS10.55 or YTF03 protein and recognizing an epitope on the BS10.55 or YTF03 protein are capable of forming a binding agent:BS10.55 or binding agent:YTF03 protein complex by specific binding. Typically, the formation of a binding agent:BS10.55 or YTF03 protein complex allows the measurement of BS10.55 or YTF03 protein in a biological sample, e.g., a mixture with other proteins and biologics. The term "antibody:BS10.55 or antibody:YTF03 protein complex" refers to an embodiment in which the binding agent is an antibody. The antibody may be monoclonal, polyclonal, or a binding fragment of an antibody, e.g., an Fab, F(ab)2, or Fv fragment. The antibody will preferably be a polyclonal antibody for cross-reactivity determinations.

"Homologous" nucleic acid sequences, when compared, exhibit significant similarity or identity. The standards for homology in nucleic acids are either measures for homology generally used in the art by sequence comparison and/or phylogenetic relationship, or based upon hybridization conditions. Hybridization conditions are described in greater detail below.

An "isolated" nucleic acid is a nucleic acid, e.g., an RNA, DNA, or a mixed polymer, which is substantially separated from other biologic components which naturally accompany a native sequence, e.g., proteins and flanking genomic sequences from the originating species. The term embraces a nucleic acid sequence which has been removed from its naturally occurring environment, and includes recombinant or cloned DNA isolates and chemically synthesized analogs, or analogs biologically synthesized by heterologous systems. A substantially pure molecule includes isolated forms of the molecule. An isolated nucleic acid will usually contain homogeneous nucleic acid molecules, but will, in some embodiments, contain nucleic acids with minor sequence heterogeneity. This heterogeneity is typically found at the polymer ends or portions not critical to a desired biological function or activity.

As used herein, the term "BS10.55" or "YTF03" protein shall encompass, when used in a protein context, a protein having amino acid sequences, particularly from the protein motif portions, shown in SEQ ID NO: 2 or 4, respectively. In many contexts, a significant fragment of such a protein will be functionally equivalent. The invention also embraces a polypeptide which exhibits similar structure to human BS10.55 or YTF03 protein, e.g., which interacts with BS10.55 or YTF03 specific binding components. These binding components, e.g., antibodies, typically bind to BS10.55 or YTF03 protein with high affinity, e.g., at least about 100 nM, usually better than about 30 nM, preferably better than about 10 nM, and more preferably at better than about 3 nM.

The term "polypeptide" or "protein" as used herein includes a significant fragment or segment of protease motif portion of BS10.55 or YTF03 protein, and encompasses a stretch of amino acid residues of at least about 8 amino acids, generally at least about 10 amino acids, more generally at least about 12 amino acids, often at least about 14 amino acids, more often at least about 16 amino acids, typically at least about 18 amino acids, more typically at least about 20 amino acids, usually at least about 22 amino acids, more usually at least about 24 amino acids, preferably at least about 26 amino acids, more preferably at least about 28 amino acids, and, in particularly preferred embodiments, at least about 30 or more amino acids, e.g., 35, 40, 45, 50, 60, 70, 80, 100, etc.

A "recombinant" nucleic acid is defined either by its method of production or its structure. In reference to its method of production, e.g., a product made by a process, the process is use of recombinant nucleic acid techniques, e.g., involving human intervention in the nucleotide sequence, typically selection or production. Alternatively, it can be a nucleic acid made by generating a sequence comprising fusion of two fragments which are not naturally contiguous to each other, but is meant to exclude products of nature, e.g., naturally occurring mutants. Thus, for example, products made by transforming cells with any non-naturally occurring vector is encompassed, as are nucleic acids comprising sequence derived using any synthetic oligonucleotide process. Such is often done to replace a codon with a redundant codon encoding the same or a conservative amino acid, while typically introducing or removing a sequence recognition site. Alternatively, it is performed to join together nucleic acid segments of desired functions to generate a single genetic entity comprising a desired combination of functions not found in the commonly available natural forms. Restriction enzyme recognition sites are often the target of such artificial manipulations, but other site specific targets, e.g., promoters, DNA replication sites, regulation sequences, control sequences, or other useful features may be incorporated by design. A similar concept is intended for a recombinant, e.g., fusion, polypeptide. Specifically included are synthetic nucleic acids which, by genetic code redundancy, encode polypeptides similar to fragments of these antigens, and fusions of sequences from various different species variants.

"Solubility" is reflected by sedimentation measured in Svedberg units, which are a measure of the sedimentation velocity of a molecule under particular conditions. The determination of the sedimentation velocity was classically performed in an analytical ultracentrifuge, but is typically now performed in a standard ultracentrifuge. See, Freifelder (1982) Physical Biochemistry (2d ed.) W.H. Freeman & Co., San Francisco, Calif.; and Cantor and Schimmel (1980) Biophysical Chemistry parts 1-3, W.H. Freeman & Co., San Francisco, Calif. As a crude determination, a sample containing a putatively soluble polypeptide is spun in a standard full sized ultracentrifuge at about 50K rpm for about 10 minutes, and soluble molecules will remain in the supernatant. A soluble particle or polypeptide will typically be less than about 30S, more typically less than about 15S, usually less than about 10S, more usually less than about 6S, and, in particular embodiments, preferably less than about 4S, and more preferably less than about 3S. Solubility of a polypeptide or fragment depends upon the environment and the polypeptide. Many parameters affect polypeptide solubility, including temperature, electrolyte environment, size and molecular characteristics of the polypeptide, and nature of the solvent. Typically, the temperature at which the polypeptide is used ranges from about 4° C. to about 65° C. Usually the temperature at use is greater than about 18° C. and more usually greater than about 22° C. For diagnostic purposes, the temperature will usually be about room temperature or warmer, but less than the denaturation temperature of components in the assay. For therapeutic purposes, the temperature will usually be body temperature, typically about 37° C. for humans, though under certain situations the temperature may be raised or lowered in situ or in vitro.

The size and structure of the polypeptide should generally be in a substantially stable state, and usually not in a denatured state. The polypeptide may be associated with other polypeptides in a quaternary structure, e.g., to confer solubility, or associated with lipids or detergents in a manner which approximates natural lipid bilayer interactions.

The solvent will usually be a biologically compatible buffer, of a type used for preservation of biological activities, and will usually approximate a physiological solvent. Usually the solvent will have a neutral pH, typically between about 5 and 10, and preferably about 7.5. On some occasions, a detergent will be added, typically a mild non-denaturing one, e.g., CHS (cholesteryl hemisuccinate) or CHAPS (3-[3-cholamidopropyl)-dimethylammonio]-1-propane sulfonate), or a low enough concentration as to avoid significant disruption of structural or physiological properties of the protein.

"Substantially pure" in a protein context typically means that the protein is isolated from other contaminating proteins, nucleic acids, and other biologicals derived from the original source organism. Purity, or "isolation" may be assayed by standard methods, and will ordinarily be at least about 50% pure, more ordinarily at least about 60% pure, generally at least about 70% pure, more. generally at least about 80% pure, often at least about 85% pure, more often at least about 90% pure, preferably at least about 95% pure, more preferably at least about 98% pure, and in most preferred embodiments, at least 99% pure. Similar concepts apply, e.g., to antibodies or nucleic acids.

"Substantial similarity" in the nucleic acid sequence comparison context means either that the segments, or their complementary strands, when compared, are identical when optimally aligned, with appropriate nucleotide insertions or deletions, in at least about 50% of the nucleotides, generally at least about 56%, more generally at least about 59%, ordinarily at least about 62%, more ordinarily at least about 65%, often at least about 68%, more often at least about 71%, typically at least about 74%, more typically at least about 77%, usually at least about 80%, more usually at least about 85%, preferably at least about 90%, more preferably at least about 95 to 98% or more, and in particular embodiments, as high at about 99% or more of the nucleotides. Alternatively, substantial similarity exists when the segments will hybridize under selective hybridization conditions, to a strand, or its complement, typically using a sequence derived from SEQ ID NO: 1 or 3. Typically, selective hybridization will occur when there is at least about 55% similarity over a stretch of at least about 30 nucleotides, preferably at least about 65% over a stretch of at least about 25 nucleotides, more preferably at least about 75%, and most preferably at least about 90% over about 20 nucleotides. See Kanehisa (1984) Nuc. Acids Res. 12:203-213. The length of similarity comparison, as described, may be over longer stretches, and in certain embodiments will be over a stretch of at least about 17 nucleotides, usually at least about 20 nucleotides, more usually at least about 24 nucleotides, typically at least about 28 nucleotides, more typically at least about 40 nucleotides, preferably at least about 50 nucleotides, and more preferably at least about 75 to 100 or more nucleotides, e.g., 150, 200, etc.

"Stringent conditions", in referring to homology or substantial similarity in the hybridization context, will be stringent combined conditions of salt, temperature, organic solvents, and other parameters, typically those controlled in hybridization reactions. The combination of parameters is generally more important than the measure of any single parameter. See, e.g., Wetmur and Davidson (1968) J. Mol. Biol. 31:349-370. A nucleic acid probe which binds to a target nucleic acid under stringent conditions is specific for said target nucleic acid. Such a probe is typically more than 11 nucleotides in length, and is sufficiently identical or complementary to a target nucleic acid over the region specified by the sequence of the probe to bind the target under stringent hybridization conditions.

BS10.55 or YTF03 proteins from other mammalian species can be cloned and isolated by cross-species hybridization of closely related species. See, e.g., below. Similarity may be relatively low between distantly related species, and thus hybridization of relatively closely related species is advisable. Alternatively, preparation of an antibody preparation which exhibits less species specificity may be useful in expression cloning approaches.

The phrase "specifically binds to an antibody" or "specifically immunoreactive with", when referring to a protein or peptide, refers to a binding reaction which is determinative of the presence of the protein in the presence of a heterogeneous population of proteins and other biological components. Thus, under designated immunoassay conditions, the specified antibodies bind to a particular protein and do not significantly bind other proteins present in the sample. Specific binding to an antibody under such conditions may require an antibody that is selected for its specificity for a particular protein. For example, antibodies raised to the human BS10.55 or YTF03 protein immunogen with the amino acid sequence depicted in SEQ ID NO: 2 or 4 can be selected by immunoaffinity or similar methods to obtain antibodies specifically immunoreactive with BS10.55 or YTF03 proteins and not with other proteins.

III. Nucleic Acids

BS10.55 or YTF03 proteins are exemplary of larger classes of structurally and functionally related proteins. The BS10.55 proteins will typically serve to cleave or process various proteins produced or processed by various cell types, e.g., for antigen presentation. The preferred embodiments, as disclosed, will be useful in standard procedures to isolate genes from different individuals or other species, e.g., warm blooded animals, such as birds and mammals. Cross hybridization will allow isolation of related genes encoding proteins from individuals, strains, or species. A number of different approaches are available to successfully isolate a suitable nucleic acid clone based upon the information provided herein. Southern blot hybridization studies can qualitatively determine the presence of homologous genes in human, monkey, rat, dog, cow, and rabbit genomes under specific hybridization conditions.

Complementary sequences will also be used as probes or primers. Based upon identification of the likely amino terminus, other peptides should be particularly useful, e.g., coupled with anchored vector or poly-A complementary PCR techniques or with complementary DNA of other peptides.

Techniques for nucleic acid manipulation of genes encoding BS10.55 or YTF03 proteins, such as subcloning nucleic acid sequences encoding polypeptides into expression vectors, labelling probes, DNA hybridization, and the like are described generally in Sambrook, et al. (1989) Molecular Cloning: A Laboratory Manual (2nd ed.) Vol. 1-3, Cold Spring Harbor Laboratory, Cold Spring Harbor Press, N.Y., which is incorporated herein by reference. This manual is hereinafter referred to as "Sambrook, et al.".

There are various methods of isolating DNA sequences encoding BS10.55 or YTF03 proteins. For example, DNA is isolated from a genomic or cDNA library using labeled oligonucleotide probes having sequences identical or complementary to the sequences disclosed herein. Full-length probes may be used, or oligonucleotide probes may be generated by comparison of the sequences disclosed. Such probes can be used directly in hybridization assays to isolate DNA encoding BS10.55 or YTF03 proteins, or probes can be designed for use in amplification techniques such as PCR, for the isolation of DNA encoding BS10.55 or YTF03 proteins.

To prepare a cDNA library, mRNA is isolated from cells, preferably which express high levels of a BS10.55 or YTF03 protein. cDNA is prepared from the mRNA and ligated, e.g., into a recombinant vector. The vector is transfected into a recombinant host for propagation, screening, and cloning. Methods for making and screening cDNA libraries are well known. See Gubler and Hoffman (1983) Gene 25:263-269 and Sambrook, et al.

For a genomic library, the DNA can be extracted from tissue, and often either mechanically sheared or enzymatically digested to yield fragments of about 12-20 kb. The fragments are then separated by gradient centrifugation and cloned in bacteriophage lambda vectors. These vectors and phage are packaged in vitro, as described in Sambrook, et al. Recombinant phage are analyzed by plaque hybridization as described in Benton and Davis (1977) Science 196:180-182. Colony hybridization is carried out as generally described in, e.g., Grunstein, et al. (1975) Proc. Natl. Acad. Sci. USA. 72:3961-3965.

DNA encoding a BS10.55 or YTF03 protein can be identified in either cDNA or genomic libraries by its ability to hybridize with the nucleic acid probes described herein, e.g., in colony or plaque hybridization assays. The corresponding DNA regions are isolated, e.g., by standard methods familiar to those of skill in the art. See, e.g., Sambrook, et al.

Various methods of amplifying target sequences, such as the polymerase chain reaction, can also be used to prepare DNA encoding BS10.55 or YTF03 proteins. Polymerase chain reaction (PCR) technology may be used to amplify such nucleic acid sequences directly from mRNA, from cDNA, and/or from genomic libraries or cDNA libraries. The isolated sequences encoding BS10.55 or YTF03 proteins may also be used as templates for PCR amplification.

Typically, in PCR techniques, oligonucleotide primers complementary to two flanking regions in the DNA region to be amplified are synthesized. The polymerase chain reaction is then carried out using the two primers. See Innis, et al. (eds.) (1990) PCR Protocols: A Guide to Methods and Applications Academic Press, San Diego, Calif. Primers can be selected to amplify the entire regions encoding a full-length human BS10.55 or YTF03 protein or to amplify smaller DNA segments, as desired. Once such regions are PCR-amplified, they can be sequenced and oligonucleotide probes can be prepared from sequence obtained using standard techniques. These probes can then be used to isolate DNA's encoding BS10.55 or YTF03 proteins.

Oligonucleotides for use as probes are usually chemically synthesized according to the solid phase phosphoramidite triester method first described by Beaucage and Carruthers (1983) Tetrahedron Lett. 22(20): 1859-1862, or using an automated synthesizer, as described in Needham-VanDevanter, et al. (1984) Nucleic Acids Res. 12:6159-6168. Purification of oligonucleotides is performed e.g., by native acrylamide gel electrophoresis or by anion-exchange HPLC as described in Pearson and Regnier (1983) J. Chrom. 255:137-149. The sequence of the synthetic oligonucleotide can be verified using, e.g., the chemical degradation method of Maxam, A. M. and Gilbert, W. in Grossman, L. and Moldave (eds.) (1980) Methods in Enzymology 65:499-560 Academic Press, New York.

An isolated nucleic acid encoding a human BS10.55 or YTF03 protein was identified. The nucleotide sequence, corresponding open reading frames, and mature peptides are provided in Tables 1 or and SEQ ID NO: 1-4.

This invention provides isolated DNA or fragments to encode a BS10.55 or YTF03 protein or specific fragment thereof. In addition, this invention provides isolated or recombinant DNA which encodes a protein or polypeptide, and which is capable of hybridizing under appropriate conditions, e.g., high stringency, with the DNA sequences described herein. Said biologically active protein or polypeptide can be a functional protease or oxidoreductase segment, or fragment, and have an amino acid sequence as disclosed in SEQ ID NO: 2 or 4. Preferred embodiments will be full length natural sequences, from isolates, or proteolytic fragments thereof. Further, this invention contemplates the use of isolated or recombinant DNA, or fragments thereof, which encode proteins which exhibit high measures of identity to a BS10.55 or YTF03 protein, or which were isolated, e.g., using cDNA encoding a BS10.55 protease or YTF03 oxidoreductase protein as a probe. The isolated DNA can have the respective regulatory sequences in the 5' and 3' flanks, e.g., promoters, enhancers, poly-A addition signals, and others.

IV. Making Human BS10.55 or YTF03 Proteins

DNAs which encode a BS10.55 or YTF03 protein, or fragments thereof, can be obtained by chemical synthesis, screening cDNA libraries, or by screening genomic libraries prepared from a wide variety of cell lines or tissue samples.

These DNAs can be expressed in a wide variety of host cells for the synthesis of a full-length protein or fragments which can in turn, e.g., be used to generate polyclonal or monoclonal antibodies; for binding studies; for construction and expression of modified molecules; and for structure/function studies. Each of BS10.55 or YTF03, or their fragments, can be expressed in host cells that are transformed or transfected with appropriate expression vectors. These molecules can be substantially purified to be free of protein or cellular contaminants, other than those derived from the recombinant host, and therefore are particularly useful in pharmaceutical compositions when combined with a pharmaceutically acceptable carrier and/or diluent. The antigen, e.g., BS10.55 or YTF03, or portions thereof, may be expressed as fusions with other proteins or possessing an epitope tag.

Expression vectors are typically self-replicating DNA or RNA constructs containing the desired antigen gene or its fragments, usually operably linked to appropriate genetic control elements that are recognized in a suitable host cell. The specific type of control elements necessary to effect expression will depend upon the eventual host cell used. Generally, the genetic control elements can include a prokaryotic promoter system or a eukaryotic promoter expression control system, and typically include a transcriptional promoter, an optional operator to control the onset of transcription, transcription enhancers to elevate the level of mRNA expression, a sequence that encodes a suitable ribosome binding site, and sequences that terminate transcription and translation. Expression vectors also usually contain an origin of replication that allows the vector to replicate independently from the host cell.

The vectors of this invention contain DNAs which encode a BS10.55 or YTF03 protein, or a significant fragment thereof, typically encoding, e.g., a biologically active polypeptide, or protein. The DNA can be under the control of a viral promoter and can encode a selection marker. This invention further contemplates use of such expression vectors which are capable of expressing eukaryotic cDNA coding for a BS10.55 or YTF03 protein in a prokaryotic or eukaryotic host, where the vector is compatible with the host and where the eukaryotic cDNA coding for the protein is inserted into the vector such that growth of the host containing the vector expresses the cDNA in question. Usually, expression vectors are designed for stable replication in their host cells or for amplification to greatly increase the total number of copies of the desirable gene per cell. It is not always necessary to require that an expression vector replicate in a host cell, e.g., it is possible to effect transient expression of the protein or its fragments in various hosts using vectors that do not contain a replication origin that is recognized by the host cell. It is also possible to use vectors that cause integration of a BS10.55 or YTF03 protein gene or its fragments into the host DNA by recombination, or to integrate a promoter which controls expression of an endogenous gene.

Vectors, as used herein, contemplate plasmids, viruses, bacteriophage, integratable DNA fragments, and other vehicles which enable the integration of DNA fragments into the genome of the host. Expression vectors are specialized vectors which contain genetic control elements that effect expression of operably linked genes. Plasmids are the most commonly used form of vector, but many other forms of vectors which serve an equivalent function are suitable for use herein. See, e.g., Pouwels, et al. (1985 and Supplements) Cloning Vectors: A Laboratory Manual Elsevier, N. Y.; and Rodriquez, et al. (eds.) (1988) Vectors: A Survey of Molecular Cloning Vectors and Their Uses Buttersworth, Boston, Mass.

Suitable host cells include prokaryotes, lower eukaryotes, and higher eukaryotes. Prokaryotes include both gram negative and gram positive organisms, e.g., E. coli and B. subtilis. Lower eukaryotes include yeasts, e.g., S. cerevisiae and Pichia, and species of the genus Dictyostelium. Higher eukaryotes include established tissue culture cell lines from animal cells, both of non-mammalian origin, e.g., insect cells, and birds, and of mammalian origin, e.g., human, primates, and rodents.

Prokaryotic host-vector systems include a wide variety of vectors for many different species. As used herein, E. coli and its vectors will be used generically to include equivalent vectors used in other prokaryotes. A representative vector for amplifying DNA is pBR322 or its derivatives. Vectors that can be used to express BS10.55 or YTF03 proteins or fragments thereof include, but are not limited to, such vectors as those containing the lac promoter (pUC-series); trp promoter (pBR322-trp); Ipp promoter (the pIN-series); lambda-pP or pR promoters (pOTS); or hybrid promoters such as ptac (pDR540). See Brosius, et al. (1988) "Expression Vectors Employing Lambda-, trp-, lac-, and Ipp-derived Promoters", in Rodriguez and Denhardt (eds.) Vectors: A Survey of Molecular Cloning Vectors and Their Uses 10:205-236 Buttersworth, Boston, Mass.

Lower eukaryotes, e.g., yeasts and Dictyostelium, may be transformed with BS10.55- or YTF03- protein sequence containing vectors. For purposes of this invention, the most common lower eukaryotic host is the baker's yeast, Saccharomyces cerevisiae. It will be used generically to represent lower eukaryotes although a number of other strains and species will be essentially equivalent. Yeast vectors typically consist of a replication origin (unless of the integrating type), one or more selection genes, a promoter, DNA encoding the desired protein or its fragments, and sequences for translation termination, polyadenylation, and transcription termination. Suitable expression vectors for yeast include such constitutive promoters as 3-phosphoglycerate kinase and various other glycolytic enzyme gene promoters or such inducible promoters as the alcohol dehydrogenase 2 promoter or metallothionine promoter. Suitable vectors include derivatives of the following types: self-replicating low copy number (such as the YRp-series), self-replicating high copy number (such as the YEp-series), integrating types (such as the YIp-series), or mini-chromosomes (such as the YCp-series).

Higher eukaryotic tissue culture cells are typically the preferred host cells for expression of the functionally active BS10.55 protease or YTF03 oxidoreductase proteins. In principle, many higher eukaryotic tissue culture cell lines may be used, e.g., insect baculovirus expression systems, whether from an invertebrate or vertebrate source. However, mammalian cells are preferred to achieve proper natural processing, both cotranslationally and posttranslationally. Transformation or transfection and propagation of such cells are routine. Useful cell lines include HeLa cells, Chinese hamster ovary (CHO) cell lines, baby rat kidney (BRK) cell lines, insect cell lines, bird cell lines, and monkey (COS) cell lines. Expression vectors for such cell lines usually include an origin of replication, a promoter, a translation initiation site, RNA splice sites (e.g., if genomic DNA is used), a polyadenylation site, and a transcription termination site. These vectors also may contain selection and/or amplification genes. Suitable expression vectors may be plasmids, viruses, or retroviruses carrying promoters derived, e.g., from such sources as from adenovirus, SV40, parvoviruses, vaccinia virus, or cytomegalovirus. Representative examples of suitable expression vectors include pcDNA1; pCD, see Okayama, et al. (1985) Mol. Cell Biol. 5:1136-1142; pMC1neo Poly-A, see Thomas, et al. (1987) Cell 51:503-512; and a baculovirus vector such as pAC 373 or pAC 610.

It is likely that BS10.55 or YTF03 protein need not be glycosylated to elicit biological responses. However, it will occasionally be desirable to express a BS10.55 or YTF03 polypeptide in a system which provides a specific or defined glycosylation pattern. In this case, the usual pattern will be that provided naturally by the expression system. However, the pattern will be modifiable by exposing the polypeptide, e.g., in unglycosylated form, to appropriate glycosylating proteins introduced into a heterologous expression system. For example, a BS10.55 or YTF03 protein gene may be co-transformed with one or more genes encoding mammalian or other glycosylating enzymes. It is further understood that over glycosylation may be detrimental to BS10.55 or YTF03 protein biological activity, and that one of skill may perform routine testing to optimize the degree of glycosylation which confers optimal biological activity.

A BS10.55 or YTF03 protein, or a fragment thereof, may be engineered to be phosphatidyl inositol (PI) linked to a cell membrane, but can be removed from membranes by treatment with a phosphatidyl inositol cleaving enzyme, e.g., phosphatidyl inositol phospholipase-C. This releases the antigen in a biologically active form, and allows purification by standard procedures of protein chemistry. See, e.g., Low (1989) Biochem. Biophys. Acta 988:427-454; Tse, et al. (1985) Science 230:1003-1008; and Brunner, et al. (1991) J. Cell Biol. 114:1275-1283.

Now that BS10.55 or YTF03 proteins have been characterized, fragments or derivatives thereof can be prepared by conventional processes for synthesizing peptides. These include processes such as are described in Stewart and Young (1984) Solid Phase Pentide Synthesis Pierce Chemical Co., Rockford, Ill.; Bodanszky and Bodanszky (1984) The Practice of Pentide Synthesis Springer-Verlag, New York, N.Y.; Bodanszky (1984) The Principles of Pentide Synthesis Springer-Verlag, New York, N.Y.; and Dawson, et al. (1994) Science 266:776-779. For example, an azide process, an acid chloride process, an acid anhydride process, a mixed anhydride process, an active ester process (for example, p-nitrophenyl ester, N-hydroxysuccinimide ester, or cyanomethyl ester), a carbodiimidazole process, an oxidative-reductive process, or a dicyclohexylcarbodiimide (DCCD)/additive process can be used. Solid phase and solution phase syntheses are both applicable to the foregoing processes.

The prepared protein and fragments thereof can be isolated and purified from the reaction mixture by means of peptide separation, for example, by extraction, precipitation, electrophoresis and various forms of chromatography, and the like. The BS10.55 or YTF03 proteins of this invention can be obtained in varying degrees of purity depending upon its desired use. Purification can be accomplished by use of known protein purification techniques or by the use of the antibodies or binding partners herein described, e.g., in immunoabsorbant affinity chromatography. This immunoabsorbant affinity chromatography is carried out, e.g., by first linking the antibodies to a solid support and then contacting the linked antibodies with solubilized lysates of appropriate source cells, lysates of other cells expressing the ligand, or lysates or supernatants of cells producing the BS10.55 or YTF03 proteins as a result of recombinant DNA techniques, see below.

Multiple cell lines may be screened for one which expresses a BS10.55 or YTF03 polypeptide or protein at a high level compared with other cells. Various cell lines, e.g., a mouse thymic stromal cell line TA4, is screened and selected for its favorable handling properties. Natural BS10.55 or YTF03 proteins can be isolated from natural sources, or by expression from a transformed cell using an appropriate expression vector. Purification of the expressed protein is achieved by standard procedures, or may be combined with engineered means for effective purification at high efficiency from cell lysates or supernatants. Epitope or other tags, e.g., FLAG or His₆ segments, can be used for such purification features.

V. Antibodies

Antibodies can be raised to various BS10.55 or YTF03 proteins, including individual, polymorphic, allelic, strain, or species variants, and fragments thereof, both in their naturally occurring (full-length) forms and in their recombinant forms. Additionally, antibodies can be raised to BS10.55 or YTF03 proteins in either their native (or active) forms or in their inactive, e.g., denatured, forms. Anti-idiotypic antibodies may also be used.

A. Antibody Production

A number of immunogens may be used to produce antibodies specifically reactive with BS10.55 or YTF03 proteins. Recombinant protein is a preferred immunogen for the production of monoclonal or polyclonal antibodies. Naturally occurring protein may also be used either in pure or impure form. Synthetic peptides, made using the human BS10.55 or YTF03 protein sequences described herein, may also used as an immunogen for the production of antibodies to BS10.55 or YTF03 proteins. Recombinant protein can be expressed in eukaryotic or prokaryotic cells as described herein, and purified as described. Naturally folded or denatured material can be used, as appropriate, for producing antibodies. Either monoclonal or polyclonal antibodies may be generated, e.g., for subsequent use in immunoassays to measure the protein.

Methods of producing polyclonal antibodies are well known to those of skill in the art. Typically, an immunogen, preferably a purified protein, is mixed with an adjuvant and animals are immunized with the mixture. The animal's immune response to the immunogen preparation is monitored by taking test bleeds and determining the titer of reactivity to the BS10.55 or YTF03 protein of interest. For example, when appropriately high titers of antibody to the immunogen are obtained, usually after repeated immunizations, blood is collected from the animal and antisera are prepared. Further fractionation of the antisera to enrich for antibodies reactive to the protein can be done if desired. See, e.g., Harlow and Lane; or Coligan.

Monoclonal antibodies may be obtained by various techniques familiar to those skilled in the art. Typically, spleen cells from an animal immunized with a desired antigen are immortalized, commonly by fusion with a myeloma cell (see, Kohler and Milstein (1976) Eur. J. Immunol. 6:511-519, incorporated herein by reference). Alternative methods of immortalization include transformation with Epstein Barr Virus, oncogenes, or retroviruses, or other methods known in the art. Colonies arising from single immortalized cells are screened for production of antibodies of the desired specificity and affinity for the antigen, and yield of the monoclonal antibodies produced by such cells may be enhanced by various techniques, including injection into the peritoneal cavity of a vertebrate host. Alternatively, one may isolate DNA sequences which encode a monoclonal antibody or a binding fragment thereof by screening a DNA library from human B cells according, e.g., to the general protocol outlined by Huse, et al. (1989) Science 246:1275-1281.

Antibodies, including binding fragments and single chain versions, against predetermined fragments of BS10.55 or YTF03 proteins can be raised by immunization of animals with conjugates of the fragments with carrier proteins as described above. Monoclonal antibodies are prepared from cells secreting the desired antibody. These antibodies can be screened for binding to normal or defective BS10.55 or YTF03 protein, or screened for agonistic or antagonistic activity, e.g., mediated through a receptor. These monoclonal antibodies will usually bind with at least a K_(D) of about 1 mM, more usually at least about 300 μM, typically at least about 10 μM, more typically at least about 30 μM, preferably at least about 10 μM, and more preferably at least about 3 μM or better.

In some instances, it is desirable to prepare monoclonal antibodies from various mammalian hosts, such as mice, rodents, primates, humans, etc. Description of techniques for preparing such monoclonal antibodies may be found in, e.g., Stites, et al. (eds.) Basic and Clinical Immunology (4th ed.) Lange Medical Publications, Los Altos, Calif., and references cited therein; Harlow and Lane (1988) Antibodies: A Laboratory Manual CSH Press; Goding (1986) Monoclonal Antibodies: Principles and Practice (2d ed.) Academic Press, New York, N.Y.; and particularly in Kohler and Milstein (1975) Nature 256:495-497, which discusses one method of generating monoclonal antibodies. Summarized briefly, this method involves injecting an animal with an immunogen. The animal is then sacrificed and cells taken from its spleen, which are then fused with myeloma cells. The result is a hybrid cell or "hybridoma" that is capable of reproducing in vitro. The population of hybridomas is then screened to isolate individual clones, each of which secrete a single antibody species to the immunogen. In this manner, the individual antibody species obtained are the products of immortalized and cloned single B cells from the immune animal generated in response to a specific site recognized on the immunogenic substance.

Other suitable techniques involve selection of libraries of antibodies in phage or similar vectors. See, e.g., Huse, et al. (1989) "Generation of a Large Combinatorial Library of the Immunoglobulin Repertoire in Phage Lambda," Science 246:1275-1281; and Ward, et al. (1989) Nature 341:544-546. The polypeptides and antibodies of the present invention may be used with or without modification, including chimeric or humanized antibodies. Frequently, the polypeptides and antibodies will be labeled by joining, either covalently or non-covalently, a substance which provides for a detectable signal. A wide variety of labels and conjugation techniques are known and are reported extensively in both the scientific and patent literature. Suitable labels include radionuclides, enzymes, substrates, cofactors, inhibitors, fluorescent moieties, chemiluminescent moieties, magnetic particles, and the like. Patents teaching the use of such labels include U.S. Pat. Nos. 3,817,837; 3,850,752; 3,939,350; 3,996,345; 4,277,437; 4,275,149; and 4,366,241. Also, recombinant immunoglobulins may be produced, see, Cabilly, U.S. Pat. No. 4,816,567; and Queen, et al. (1989) Proc. Nat'l Acad. Sci. USA 86:10029-10033; or made in transgenic mice, see Mendez, et al. (1997) Nature Genetics 15:146-156.

The antibodies of this invention are useful for affinity chromatography in isolating BS10.55 or YTF03 protein. Columns can be prepared where the antibodies are linked to a solid support, e.g., particles, such as agarose, SEPHADEX, or the like, where a cell lysate or supernatant may be passed through the column, the column washed, followed by increasing concentrations of a mild denaturant, whereby purified BS10.55 or YTF03 protein will be released. The converse can be performed using protein to isolate specific antibodies.

Other antibodies may block enzymatic activity. The antibodies may also be used to screen expression libraries for particular expression products. Usually the antibodies used in such a procedure will be labeled with a moiety allowing easy detection of presence of antigen by antibody binding.

Antibodies to BS10.55 or YTF03 proteins may be used for the identification of cell populations expressing BS10.55 or YTF03 protein. By assaying the expression products of cells expressing BS10.55 or YTF03 proteins it is possible to diagnose disease, e.g., metabolic conditions. The proteins may also be markers for specific tissue or cell subpopulations, e.g., dendritic cells.

Antibodies raised against each BS10.55 or YTF03 protein will also be useful to raise anti-idiotypic antibodies. These will be useful in detecting or diagnosing various immunological conditions related to expression of the respective antigens.

B. Immunoassays

A particular protein can be measured by a variety of immunoassay methods. For a review of immunological and immunoassay procedures in general, see Stites and Terr (eds.) (1991) Basic and Clinical Immunology (7th ed.). Moreover, the immunoassays of the present invention can be performed in many configurations, which are reviewed extensively in Maggio (ed.) (1980) Enzyme Immunoassay CRC Press, Boca Raton, Fla.; Tijan (1985) "Practice and Theory of Enzyme Immunoassays," Laboratory Techniques in Biochemistry and Molecular Biology, Elsevier Science Publishers B. V., Amsterdam; and Harlow and Lane Antibodies, A Laboratory Manual, supra, each of which is incorporated herein by reference. See also Chan (ed. 1987) Immunoassay: A Practical Guide Academic Press, Orlando, Fla.; Price and Newman (eds. 1991) Principles and Practice of Immunoassays Stockton Press, NY; and Ngo (ed. 1988) Non-isotonic Immunoassays Plenum Press, NY.

Immunoassays for measurement of BS10.55 or YTF03 proteins or peptides can be performed by a variety of methods known to those skilled in the art. In brief, immunoassays to measure the protein can be either competitive or noncompetitive binding assays. In competitive binding assays, the sample to be analyzed competes with a labeled analyte for specific binding sites on a capture agent bound to a solid surface. Preferably the capture agent is an antibody specifically reactive with BS10.55 or YTF03 proteins produced as described above. The concentration of labeled analyte bound to the capture agent is inversely proportional to the amount of free analyte present in the sample.

In a competitive binding immunoassay, the BS10.55 or YTF03 protein present in the sample competes with labeled protein for binding to a specific binding agent, for example, an antibody specifically reactive with the BS10.55 or YTF03 protein. The binding agent may be bound to a solid surface to effect separation of bound labeled protein from the unbound labeled protein. Alternately, the competitive binding assay may be conducted in liquid phase and a variety of techniques known in the art may be used to separate the bound labelled protein from the unbound labeled protein. Following separation, the amount of bound labeled protein is determined. The amount of protein present in the sample is inversely proportional to the amount of labeled protein binding.

Alternatively, a homogeneous immunoassay may be performed in which a separation step is not needed. In these immunoassays, the label on the protein is altered by the binding of the protein to its specific binding agent. This alteration in the labeled protein results in a decrease or increase in the signal emitted by label, so that measurement of the label at the end of the immunoassay allows for detection or quantitation of the protein.

BS10.55 or YTF03 proteins may also be determined by a variety of noncompetitive immunoassay methods. For example, a two-site, solid phase sandwich immunoassay may be used. In this type of assay, a binding agent for the protein, for example an antibody, is attached to a solid support. A second protein binding agent, which may also be an antibody, and which binds the protein at a different site, is labeled. After binding at both sites on the protein has occurred, the unbound labeled binding agent is removed and the amount of labeled binding agent bound to the solid phase is measured. The amount of labeled binding agent bound is directly proportional to the amount of protein in the sample.

Western blot analysis can be used to determine the presence of BS10.55 or YTF03 proteins in a sample. Electrophoresis is carried out, for example, on a tissue sample suspected of containing the protein. Following electrophoresis to separate the proteins, and transfer of the proteins to a suitable solid support, e.g., a nitrocellulose filter, the solid support is incubated with an antibody reactive with the protein. This antibody may be labeled, or alternatively may be detected by subsequent incubation with a second labeled antibody that binds the primary antibody.

The immunoassay formats described above may employ labeled assay components. The label may be coupled directly or indirectly to the desired component of the assay according to methods well known in the art. A wide variety of labels and methods may be used. Traditionally, a radioactive label incorporating ³ H, ¹²⁵ I, ³⁵ S, ¹⁴ C, or ³² P was used. Non-radioactive labels include ligands which bind to labeled antibodies, fluorophores, chemiluminescent agents, enzymes, and antibodies which can serve as specific binding pair members for a labeled ligand. The choice of label depends on sensitivity required, ease of conjugation with the compound, stability requirements, and available instrumentation. For a review of various labeling or signal producing systems which may be used, see U.S. Pat. No. 4,391,904, which is incorporated herein by reference.

Antibodies reactive with a particular protein can also be measured by a variety of immunoassay methods. For a review of immunological and immunoassay procedures applicable to the measurement of antibodies by immunoassay techniques, see Stites and Terr (eds.) Basic and Clinical Immunology (7th ed.) supra; Maggio (ed.) Enzyme Immunoassay, supra; and Harlow and Lane Antibodies, A Laboratory Manual, supra.

In brief, immunoassays to measure antisera reactive with BS10.55 or YTF03 proteins can be either competitive or noncompetitive binding assays. In competitive binding assays, the sample analyte competes with a labeled analyte for specific binding sites on a capture agent bound to a solid surface. Preferably the capture agent is a purified recombinant BS10.55 or YTF03 protein produced as described above. Other sources of BS10.55 or YTF03 proteins, including isolated or partially purified naturally occurring protein, may also be used. Noncompetitive assays include sandwich assays, in which the sample analyte is bound between two analyte-specific binding reagents. One of the binding agents is used as a capture agent and is bound to a solid surface. The second binding agent is labeled and is used to measure or detect the resultant complex by visual or instrument means. A number of combinations of capture agent and labelled binding agent can be used. A variety of different immunoassay formats, separation techniques, and labels can be also be used similar to those described above for the measurement of BS10.55 or YTF03 proteins. Similar methods may be used to evaluate or quantitate specific binding compounds.

VI. Purified BS10.55 or YTF03 Proteins

Human BS10.55 or YTF03 protein amino acid sequences are provided in SEQ ID NO: 2 and 4.

Purified protein or defined peptides are useful for generating antibodies by standard methods, as described above. Synthetic peptides or purified protein can be presented to an immune system to generate polyclonal and monoclonal antibodies. See, e.g., Coligan (1991) Current Protocols in Immunology Wiley/Greene, NY; and Harlow and Lane (1989) Antibodies: A Laboratory Manual Cold Spring Harbor Press, N.Y., which are incorporated herein by reference.

The specific binding composition can be used for screening an expression library made from a cell line which expresses a BS10.55 or YTF03 protein. Many methods for screening are available, e.g., standard staining of surface expressed ligand, or by panning. Screening of intracellular expression can also be performed by various staining or immunofluorescence procedures. The binding compositions could be used to affinity purify or sort out cells expressing the ligand.

The peptide segments, along with comparison to homologous genes, can also be used to produce appropriate oligonucleotides to screen a library. The genetic code can be used to select appropriate oligonucleotides useful as probes for screening. In combination with polymerase chain reaction (PCR) techniques, synthetic oligonucleotides will be useful in selecting desired clones from a library, including natural allelic and polymorphic variants.

The peptide sequences allow preparation of peptides to generate antibodies to recognize such segments, and allow preparation of oligonucleotides which encode such sequences. The sequence also allows for synthetic preparation, e.g., see Dawson, et al. (1994) Science 266:776-779. Analysis of the structural features in comparison with the most closely related reported sequences has revealed similarities with other proteins, particularly the class of proteins known as proteases or oxidoreductases.

VII. Physical Variants

This invention also encompasses proteins or peptides having substantial amino acid sequence similarity with an amino acid sequence of a BS10.55 or YTF03 protein. Natural variants include individual, polymorphic, allelic, strain, or species variants. Conservative substitutions in the amino acid sequence will normally preserve most relevant biological activities. In particular, various substitutions can be made, e.g., embodiments with 10-fold substitutions, 7-fold substitutions, 5-fold substitutions, 3-fold substitutions, 2-fold, and etc. Such embodiments will typically retain particular features, e.g., antigenicity, with the natural forms.

Amino acid sequence similarity, or sequence identity, is determined by optimizing residue matches, if necessary, by introducing gaps as required. This changes when considering conservative substitutions as matches. Conservative substitutions typically include substitutions within the following groups: glycine, alanine; valine, isoleucine, leucine; aspartic acid, glutamic acid; asparagine, glutamine; serine, threonine; lysine, arginine; and phenylalanine, tyrosine. Homologous amino acid sequences include natural polymorphic, allelic, and interspecies variations in each respective protein sequence. Typical homologous proteins or peptides will have from 50-100% similarity (if gaps can be introduced), to 75-100% similarity (if conservative substitutions are included) with the amino acid sequence of the BS10.55 or YTF03 protein. Similarity measures will be at least about 50%, generally at least about 60%, more generally at least about 65%, usually at least about 70%, more usually at least about 75%, preferably at least about 80%, and more preferably at least about 80%, and in particularly preferred embodiments, at least about 85% or more. See also Needleham, et al. (1970) J. Mol. Biol. 48:443-453; Sankoff, et al. (1983) Time Warps, String Edits, and Macromolecules: The Theory and Practice of Sequence Comparison Chapter One, Addison-Wesley, Reading, Mass; and software packages from IntelliGenetics, Mountain View, Calif.; and the University of Wisconsin Genetics Computer Group, Madison, Wis.

Natural nucleic acids encoding mammalian BS10.55 or YTF03 proteins will typically hybridize to the nucleic acid sequence of SEQ ID NO: 1 or 3 under stringent conditions. For example, nucleic acids encoding human BS10.55 or YTF03 proteins will normally hybridize to the nucleic acid of SEQ ID NO: 1 or 3 under stringent hybridization conditions. Generally, stringent conditions are selected to be about 10° C. lower than the thermal melting point (Tm) for the probe sequence at a defined ionic strength and pH. The Tm is the temperature (under defined ionic strength and pH) at which 50% of the target sequence hybridizes to a perfectly matched probe. Typically, stringent conditions will be those in which the salt concentration is about 0.2 molar at pH 7 and the temperature is at least about 50° C. Other factors may significantly affect the stringency of hybridization, including, among others, base composition and size of the complementary strands, the presence of organic solvents such as formamide, and the extent of base mismatching. A preferred embodiment will include nucleic acids which will bind to disclosed sequences in 50% formamide and 200 mM NaCl at 42° C. See, e.g., Sambrook, et al.

An isolated BS10.55 or YTF03 protein DNA can be readily modified by nucleotide substitutions, nucleotide deletions, nucleotide insertions, and short inversions of nucleotide stretches. These modifications result in novel DNA sequences which encode BS10.55 or YTF03 protein antigens, their derivatives, or proteins having highly similar physiological, immunogenic, or antigenic activity.

Modified sequences can be used to produce mutant antigens or to enhance expression. Enhanced expression may involve gene amplification, increased transcription, increased translation, and other mechanisms. Such mutant BS10.55 or YTF03 protein derivatives include predetermined or site-specific mutations of the respective protein or its fragments. "Mutant BS10.55 or YTF03 protein" encompasses a polypeptide otherwise falling within the homology definition of the human BS10.55 or YTF03 protein as set forth above, but having an amino acid sequence which differs from that of a BS10.55 or YTF03 protein as found in nature, whether by way of deletion, substitution, or insertion. In particular, "site specific mutant BS10.55 or YTF03 protein" generally includes proteins having significant similarity with a protein having a sequence of SEQ ID NO: 2 or 4, and as sharing various biological activities, e.g., antigenic or immunogenic, with those sequences, and in preferred embodiments contain most or all of the disclosed sequence. This applies also to polymorphic variants from different individuals. Similar concepts apply to different BS10.55 or YTF03 proteins, particularly those found in various warm blooded animals, e.g., mammals and birds. As stated before, it is emphasized that descriptions are generally meant to encompass other BS10.55 or YTF03 proteins, not limited to the human embodiments specifically discussed.

Although site specific mutation sites are predetermined, mutants need not be site specific. BS10.55 or YTF03 protein mutagenesis can be conducted by making amino acid insertions or deletions. Substitutions, deletions, insertions, or combinations may be generated to arrive at a final construct. Insertions include amino- or carboxyl- terminal fusions, e.g. epitope tags. Random mutagenesis can be conducted at a target codon and the expressed mutants can then be screened for the desired activity. Methods for making substitution mutations at predetermined sites in DNA having a known sequence are well known in the art, e.g., by M13 primer mutagenesis or polymerase chain reaction (PCR) techniques. See also, Sambrook, et al. (1989) and Ausubel, et al. (1987 and Supplements). The mutations in the DNA normally should not place coding sequences out of reading frames and preferably will not create complementary regions that could hybridize to produce secondary mRNA structure such as loops or hairpins.

The present invention also provides recombinant proteins, e.g., heterologous fusion proteins using segments from these proteins. A heterologous fusion protein is a fusion of proteins or segments which are naturally not normally fused in the same manner. Thus, the fusion product of an immunoglobulin with a BS10.55 or YTF03 protein polypeptide is a continuous protein molecule having sequences fused in a typical peptide linkage, typically made as a single translation product and exhibiting properties derived from each source peptide. A similar concept applies to heterologous nucleic acid sequences. Antibody fusion proteins are also contemplated.

In addition, new constructs may be made from combining similar functional domains from other proteins. For example, protein-binding or other segments may be "swapped" between different new fusion polypeptides or fragments. See, e.g., Cunningham, et al. (1989) Science 243:1330-1336; and O'Dowd, et al. (1988) J. Biol. Chem. 263:15985-15992. Thus, new chimeric polypeptides exhibiting new combinations of specificities will result from the functional linkage of protein-binding specificities and other functional domains.

VIII. Binding Agent:BS10.55 or Agent:YTF03 Protein Complexes

A BS10.55 or YTF03 protein that specifically binds to or that is specifically immunoreactive with an antibody generated against a defined immunogen, such as an immunogen consisting of the amino acid sequence of SEQ ID NO: 2 or 4, is typically determined in an immunoassay. The immunoassay uses a polyclonal antiserum which was raised to a protein of SEQ ID NO: 2 or 4. This antiserum is selected to have low crossreactivity against other proteases and any such crossreactivity is removed by immunoabsorption prior to use in the immunoassay.

In order to produce antisera for use in an immunoassay, the protein of SEQ ID NO: 2 or 4 is isolated as described herein. For example, recombinant protein may be produced in a mammalian cell line. An inbred strain of mice such as balb/c is immunized with the protein of SEQ ID NO: 2 or 4 using a standard adjuvant, such as Freund's adjuvant, and a standard mouse immunization protocol (see Harlow and Lane, supra). Alternatively, a synthetic peptide, preferably near full length, derived from the sequences disclosed herein and conjugated to a carrier protein can be used an immunogen. Polyclonal sera are collected and titered against the immunogen protein in an immunoassay, for example, a solid phase immunoassay with the immunogen immobilized on a solid support. Polyclonal antisera with a titer of 10⁴ or greater are selected and tested for their cross reactivity against other proteases or oxidoreductases, e.g., using a competitive binding immunoassay such as the one described in Harlow and Lane, supra, at pages 570-573. Preferably two related proteins are used in this determination in conjunction with either BS10.55 or YTF03 protein.

Immunoassays in the competitive binding format can be used for the crossreactivity determinations. For example, a protein of SEQ ID NO: 2 or 4 can be immobilized to a solid support. Proteins added to the assay compete with the binding of the antisera to the immobilized antigen. The ability of the above proteins to compete with the binding of the antisera to the immobilized protein is compared to the protein of SEQ ID NO: 2 or 4. The percent crossreactivity for the above proteins is calculated, using standard calculations. Those antisera with less than 10% crossreactivity with each of the proteins listed above are selected and pooled. The cross-reacting antibodies are then removed from the pooled antisera by immunoabsorbtion with the above-listed proteins.

The immunoabsorbed and pooled antisera are then used in a competitive binding immunoassay as described above to compare a second protein to the immunogen protein (e.g., the protein motif of SEQ ID NO: 2 or 4). In order to make this comparison, the two proteins are each assayed at a wide range of concentrations and the amount of each protein required to inhibit 50% of the binding of the antisera to the immobilized protein is determined. If the amount of the second protein required is less than twice the amount of the protein of SEQ ID NO: 2 or 4 that is required, then the second protein is said to specifically bind to an antibody generated to the immunogen.

It is understood that BS10.55 or YTF03 proteins are families of homologous proteins that comprise two or more genes. For a particular gene product, such as the human BS10.55 or YTF03 proteins, the term refers not only to the amino acid sequences disclosed herein, but also to other proteins that are polymorphic, allelic, non-allelic, or species variants or equivalents. It is also understood that the term "human BS10.55 or YTF03 protein" includes equivalent proteins, e.g., nonnatural mutations introduced by deliberate mutation using conventional recombinant technology such as single site mutation, or by excising short sections of DNA encoding BS10.55 or YTF03 proteins, or by substituting new amino acids, or adding new amino acids. Such minor alterations must substantially maintain the immunoidentity of the original molecule and/or its biological activity. Thus, these alterations include proteins that are specifically immunoreactive with a designated naturally occurring BS10.55 or YTF03 protein, for example, the human BS10.55 or YTF03 protein shown in SEQ ID NO: 2 or 4. The biological properties of the altered proteins can be determined by expressing the protein in an appropriate cell line and measuring, e.g., enzymatic activity under appropriate conditions. Particular protein modifications considered minor would include conservative substitution of amino acids with similar chemical properties, as described above for BS10.55 or YTF03 protein families as a whole. By aligning a protein optimally with the protein of SEQ ID NO: 2 or 4, and by using the conventional immunoassays described herein to determine immunoidentity, or by using lymphocyte chemotaxis assays, one can determine the protein compositions of the invention.

IX. Functional Variants

The blocking of physiological response to BS10.55 or YTF03 protein may result from the inhibition of enzymatic activity of the protein against its substrate, e.g., through competitive inhibition. Thus, in vitro assays of the present invention will often use isolated protein, membranes from cells expressing a recombinant membrane associated proteins, soluble fragments comprising enzymatically active segments of these proteins, or fragments attached to solid phase substrates. These assays will also allow for the diagnostic determination of the effects of either binding segment mutations and modifications, or protein mutations and modifications, e.g., protein analogs. This invention also contemplates the use of competitive drug screening assays, e.g., where neutralizing antibodies to antigen or enzyme fragments compete with a test compound for binding to the protein. In this manner, the antibodies can be used to detect the resence of a polypeptide which shares one or more antigenic binding sites of the protein and can also be used to occupy binding sites on the protein that might otherwise interact with, e.g., substrate.

"Derivatives" of BS10.55 or YTF03 proteins include amino acid sequence mutants, glycosylation variants, and covalent or aggregate conjugates with other chemical moieties. Covalent derivatives can be prepared by linkage of functionalities to groups which are found in BS10.55 or YTF03 protein amino acid side chains or at the N- or C-termini, e.g., by means which are well known in the art. These derivatives can include, without limitation, aliphatic esters or amides of the carboxyl terminus, or of residues containing carboxyl side chains, O-acyl derivatives of hydroxyl group-containing residues, and N-acyl derivatives of the amino terminal amino acid or amino-group containing residues, e.g., lysine or arginine. Acyl groups are typically selected from the group of alkyl-moieties including C3 to C18 normal alkyl, thereby forming alkanoyl aroyl species. Covalent attachment to carrier proteins may be important when immunogenic moieties are haptens.

In particular, glycosylation alterations are included, e.g., made by modifying the glycosylation patterns of a polypeptide during its synthesis and processing, or in further processing steps. Particularly preferred means for accomplishing this are by exposing the polypeptide to glycosylating enzymes derived from cells which normally provide such processing, e.g., mammalian glycosylation enzymes. Deglycosylation enzymes are also contemplated. Also embraced are versions of the same primary amino acid sequence which have other minor modifications, including phosphorylated amino acid residues, e.g., phosphotyrosine, phosphoserine, or phosphothreonine, or other moieties, including ribosyl groups or cross-linking reagents.

A major group of derivatives are covalent conjugates of the BS10.55 or YTF03 protein or fragments thereof with other proteins or polypeptides. These derivatives can be synthesized in recombinant culture such as N- or C-terminal fusions or by the use of agents known in the art for their usefulness in cross-linking proteins through reactive side groups. Preferred protein derivatization sites with cross-linking agents are at free amino groups, carbohydrate moieties, and cysteine residues.

Fusion polypeptides between human BS10.55 or YTF03 proteins and other homologous or heterologous proteins are also provided. Heterologous polypeptides may be fusions between different related proteins, resulting in, e.g., a hybrid protein exhibiting modified substrate or other binding specificity. Likewise, heterologous fusions may be constructed which would exhibit a combination of properties or activities of the derivative proteins. Typical examples are fusions of a reporter polypeptide, e.g., luciferase, with a segment or domain of a protein, e.g., a receptor-binding segment, so that the presence or location of the fused protein may be easily determined. See, e.g., Dull, et al., U.S. Pat. No. 4,859,609. Other gene fusion partners include bacterial β-galactosidase, trpE, Protein A, β-lactamase, alpha amylase, alcohol dehydrogenase, and yeast alpha mating factor. See, e.g., Godowski, et al. (1988) Science 241:812-816.

Such polypeptides may also have amino acid residues which have been chemically modified by phosphorylation, sulfonation, biotinylation, or the addition or removal of other moieties, particularly those which have molecular shapes similar to phosphate groups. In some embodiments, the modifications will be useful labeling reagents, or serve as purification targets, e.g., affinity ligands.

This invention also contemplates the use of derivatives of BS10.55 or YTF03 proteins other than variations in amino acid sequence or glycosylation. Such derivatives may involve covalent or aggregative association with chemical moieties. These derivatives generally include the three classes: (1) salts, (2) side chain and terminal residue covalent modifications, and (3) adsorption complexes, for example with cell membranes. Such covalent or aggregative derivatives are useful as immunogens, as reagents in immunoassays, or in purification methods such as for affinity purification of ligands or other binding ligands. For example, a BS10.55 or YTF03 protein can be immobilized by covalent bonding to a solid support such as cyanogen bromide-activated SEPHAROSE, by methods which are well known in the art, or adsorbed onto polyolefin surfaces, with or without glutaraldehyde cross-linking, for use in the assay or purification of anti-BS10.55 or anti-YTF03 protein antibodies. The BS10.55 or YTF03 proteins can also be labeled with a detectable group, e.g., radioiodinated by the chloramine T procedure, covalently bound to rare earth chelates, or conjugated to another fluorescent moiety for use in diagnostic assays. Purification of BS10.55 or YTF03 proteins may be effected by immobilized antibodies or substrate.

Isolated BS10.55 or YTF03 protein genes will allow transformation of cells lacking expression of corresponding BS10.55 or YTF03 proteins, e.g., either species types or cells which lack corresponding proteins and exhibit negative background activity. Expression of transformed genes will allow isolation of antigenically pure cell lines, with defined or single specie variants. This approach will allow for more sensitive detection and discrimination of the physiological effects of BS10.55 or YTF03 protein substrate proteins. Subcellular fragments, e.g., cytoplasts or membrane fragments, can be isolated and used.

X. Uses

The present invention provides reagents which will find use in diagnostic applications as described elsewhere herein, e.g., in the general description for metabolic abnormalities, or below in the description of kits for diagnosis.

BS10.55 or YTF03 protein nucleotides, e.g., human BS10.55 or YTF03 protein DNA or RNA, may be used as a component in a forensic assay. For instance, the nucleotide sequences provided may be labeled using, e.g., ³² P or biotin and used to probe standard restriction fragment polymorphism blots, providing a measurable character to aid in distinguishing between individuals. Such probes may be used in well-known forensic techniques such as genetic fingerprinting. In addition, nucleotide probes made from BS10.55 or YTF03 protein sequences may be used in in situ assays to detect chromosomal abnormalities.

Antibodies and other binding agents directed towards BS10.55 or YTF03 proteins or nucleic acids may be used to purify the corresponding BS10.55 or YTF03 protein molecule. As described in the Examples below, antibody purification of BS10.55 or YTF03 protein components is both possible and practicable. Antibodies and other binding agents may also be used in a diagnostic fashion to determine whether BS10.55 or YTF03 protein components are present in a tissue sample or cell population using well-known techniques described herein. The ability to attach a binding agent to a BS10.55 or YTF03 protein provides a means to diagnose disorders associated with BS10.55 or YTF03 protein misregulation. Antibodies and other BS10.55 or YTF03 protein binding agents may also be useful as histological or sorting markers. As described in the examples below, BS10.55 or YTF03 protein expression is limited to specific tissue types. By directing a probe, such as an antibody or nucleic acid to a BS10.55 or YTF03 protein, it is possible to use the probe to distinguish tissue and cell types in situ or in vitro.

This invention also provides reagents with significant therapeutic value. The BS10.55 or YTF03 protein (naturally occurring or recombinant), fragments thereof, and antibodies thereto, along with compounds identified as having binding affinity to a BS10.55 or YTF03 protein, are useful in the treatment of conditions associated with abnormal metabolism, physiology, or development, including abnormal immune responsiveness or non-responsiveness. Abnormal proliferation, regeneration, degeneration, and atrophy may be modulated by appropriate therapeutic treatment using the compositions provided herein. The BS10.55 or YTF03 proteins likely play roles in regulation or development of hematopoietic cells, e.g., lymphoid cells, which affect immunological responses. Thus, for example, an antagonist of a BS10.55 or YTF03 protein could be useful in blocking the conversion of an immature or inactive immunologically relevant pro-protein to the mature or active form. Since the BS10.55 proteases were derived from dendritic cells, antagonists could also be important in preventing antigen processing and/or subsequent presentation.

Other abnormal developmental conditions are known in cell types shown to possess BS10.55 or YTF03 protein encoding mRNA by northern blot analysis. See Berkow (ed.) The Merck Manual of Diaanosis and Therapv. Merck & Co., Rahway, N.J.; and Thorn, et al. Harrison's Principles of Internal Medicine, McGraw-Hill, NY Developmental or functional abnormalities, e.g., of the immune system, cause significant medical abnormalities and conditions which may be susceptible to prevention or treatment using compositions provided herein.

Recombinant BS10.55 or YTF03 protein antibodies can be purified and then administered to a patient. These reagents can be combined for therapeutic use with additional active or inert ingredients, e.g., in conventional pharmaceutically acceptable carriers or diluents, e.g., immunogenic adjuvants, along with physiologically innocuous stabilizers and excipients. These combinations can be sterile filtered and placed into dosage forms as by lyophilization in dosage vials or storage in stabilized aqueous preparations. This invention also contemplates use of antibodies or binding fragments thereof, including forms which are not complement binding.

Drug screening using antibodies or fragments thereof can identify compounds having binding affinity to BS10.55 or YTF03 protein, including isolation of associated components. Various substrate candidates can be screened. Subsequent biological assays can then be utilized to determine if the compound has intrinsic enzyme blocking activity. Likewise, a compound having intrinsic stimulating activity might activate the activity of a BS10.55 or YTF03 protein. This invention further contemplates the therapeutic use of antibodies to BS10.55 or YTF03 protein as antagonists. This approach should be particularly useful with other BS10.55 or YTF03 protein polymorphic or species variants.

The quantities of reagents necessary for effective therapy will depend upon many different factors, including means of administration, target site, physiological state of the patient, and other medicants administered. Thus, treatment dosages should be titrated to optimize safety and efficacy. Typically, dosages used in vitro may provide useful guidance in the amounts useful for in situ administration of these reagents. Animal testing of effective doses for treatment of particular disorders will provide further predictive indication of human dosage. Various considerations are described, e.g., in Gilman, et al. (eds.) (1990) Goodman and Gilman's: The Pharmacolocical Bases of Theraeutics (8th ed.) Pergamon Press; and (1990) Remincton's Pharmaceutical Sciences (17th ed.) Mack Publishing Co., Easton, Pa. Methods for administration are discussed therein and below, e.g., for oral, intravenous, intraperitoneal, or intramuscular administration, transdermal diffusion, and others. Pharmaceutically acceptable carriers will include water, saline, buffers, and other compounds described, e.g., in the Merck Index, Merck & Co., Rahway, N.J. Dosage ranges would ordinarily be expected to be in amounts lower than 1 mM concentrations, typically less than about 10 μM concentrations, usually less than about 100 nM, preferably less than about 10 pM (picomolar), and most preferably less than about 1 fM (femtomolar), with an appropriate carrier. Slow release formulations, or a slow release apparatus will often be utilized for continuous administration.

BS10.55 or YTF03 proteins, fragments thereof; antibodies to it or its fragments; antagonists; and agonists, may be administered directly to the host to be treated or, depending on the size of the compounds, it may be desirable to conjugate them to carrier proteins such as ovalbumin or serum albumin prior to their administration. Therapeutic formulations may be administered in any conventional dosage formulation. While it is possible for the active ingredient to be administered alone, it is preferable to present it as a pharmaceutical formulation Formulations typically comprise at least one active ingredient, as defined above, together with one or more acceptable carriers thereof. Each carrier should be both pharmaceutically and physiologically acceptable in the sense of being compatible with the other ingredients and not injurious to the patient. Formulations include those suitable for oral, rectal, nasal, or parenteral (including subcutaneous, intramuscular, intravenous and intradermal) administration. The formulations may conveniently be presented in unit dosage form and may be prepared by any methods well known in the art of pharmacy. See, e.g., Gilman, et al. (eds.) (1990) Goodman and Gilman's: The Pharmacological Bases of Therapeutics (8th ed.) Pergamon Press; and (1990) Remington's Pharmaceutical Sciences (17th ed.) Mack Publishing Co., Easton, Pa.; Avis, et al. (eds.) (1993) Pharmaceutical Dosaae Forms: Parenteral Medications Dekker, NY; Lieberman, et al. (eds.) (1990) Pharmaceutical Dosage Forms: Tablets Dekker, N.Y.; and Lieberman, et al. (eds.) (1990) Pharmaceutical Dosaae Forms: Disperse Systems Dekker, N.Y. The therapy of this invention may be combined with or used in association with other therapeutic agents.

Both the naturally occurring and the recombinant forms of the BS10.55 or YTF03 proteins of this invention are particularly useful in kits and assay methods which are capable of screening compounds for binding activity to the proteins, including substrates or competitive inhibitors. Several methods of automating assays have been developed in recent years so as to permit screening of tens of thousands of compounds in a short period. See, e.g., Fodor, et al. (1991) Science 251:767-773, and other descriptions of chemical diversity libraries, which describe means for testing of binding affinity by a plurality of compounds. The development of suitable assays can be greatly facilitated by the availability of large amounts of purified, soluble BS10.55 or YTF03 protein as provided by this invention.

For example, antagonists can normally be found once the protein has been structurally defined. Testing of potential substrates or analogs is now possible upon the development of highly automated assay methods using a purified enzyme. In particular, new agonists and antagonists will be discovered by using screening techniques described herein. Of particular importance are compounds found to have a combined blockage activity for multiple BS10.55 or YTF03 protein substrates, e.g., compounds which can serve as antagonists for polymorphic or species variants of a BS10.55 or YTF03 protein.

This invention is particularly useful for screening compounds by using recombinant protein in a variety of drug screening techniques. The advantages of using a recombinant protein in screening for specific ligands include: (a) improved renewable source of the BS10.55 or YTF03 protein from a specific source; (b) potentially greater number of molecules per cell giving better signal to noise ratio in assays; and (c) species variant specificity (theoretically giving greater biological and disease specificity).

One method of drug screening utilizes eukaryotic or prokaryotic host cells which are stably transformed with recombinant DNA molecules expressing a BS10.55 or YTF03 protein substrate. Cells may be isolated which express a substrate in isolation from any others. Such cells, either in viable or fixed form, can be used for standard enzyme/substrate cleavage or oxidoreductase assays. See also, Parce, et al. (1989) Science 246:243-247; and Owicki, et al. (1990) Proc. Nat'l Acad. Sci. USA 87:4007-4011, which describe sensitive methods to detect cellular responses. Competitive assays are particularly useful, where the cells (source of BS10.55 or YTF03 protein) or homogenates are contacted and incubated with a labeled antibody having known binding affinity to the protein, such as ¹²⁵ I-antibody, and a test sample whose binding affinity to the binding composition is being measured. The bound and free labeled binding compositions are then separated to assess the degree of antigen binding. The amount of test compound bound is inversely proportional to the amount of labeled reagent binding to the known source. Any one of numerous techniques can be used to separate bound from free antigen to assess the degree of ligand binding. This separation step could typically involve a procedure such as adhesion to filters followed by washing, adhesion to plastic followed by washing, or centrifugation of the cell membranes. Viable cells could also be used to screen for the effects of drugs on BS10.55 or YTF03 protein mediated functions, e.g., substrate cleavage, oxidoreductase activity, and others. Some detection methods allow for elimination of a separation step, e.g., a proximity sensitive detection system.

Another method utilizes solubilized, unpurified or solubilized, purified BS10.55 or YTF03 protein from transformed eukaryotic or prokaryotic host cells. This allows for a "molecular" binding assay with the advantages of increased specificity, the ability to automate, and high drug test throughput.

Another technique for drug screening involves an approach which provides high throughput screening for compounds having suitable binding affinity to a BS10.55 or YTF03 protein, e.g., an antibody, is described in detail in Geysen, European Patent Application 84/03564, published on Sep. 13, 1984. First, large numbers of different small peptide test compounds are synthesized on a solid substrate, e.g., plastic pins or some other appropriate surface, see Fodor, et al., supra. Then all the pins are reacted with solubilized, unpurified or solubilized, purified BS10.55 or YTF03 protein antibody, and washed. The next step involves detecting bound BS10.55 or YTF03 protein antibody.

Rational drug design may also be based upon structural studies of the molecular shapes of the BS10.55 or YTF03 protein and other effectors or analogs. See, e.g., Methods in Enzymology vols. 202 and 203. Effectors may be other proteins which mediate other functions in response to antigen binding, or other proteins which normally interact with the substrate. One means for determining which sites interact with specific other proteins is a physical structure determination, e.g., x-ray crystallography or 2 dimensional NMR techniques. These will provide guidance as to which amino acid residues form molecular contact regions. For a detailed description of protein structural determination, see, e.g., Blundell and Johnson (1976) Protein Crystalloaraphy Academic Press, NY.

A purified BS10.55 or YTF03 protein can be coated directly onto plates for use in the aforementioned drug screening techniques. However, non-neutralizing antibodies to these antigens can be used as capture antibodies to immobilize the respective antigen on the solid phase.

XI. Kits

This invention also contemplates use of BS10.55 or YTF03 proteins, fragments thereof, peptides, and their fusion products in a variety of diagnostic kits and methods for detecting the presence of BS10.55 or YTF03 protein or a BS10.55 or YTF03 protein substrate. Typically the kit will have a compartment containing either a defined BS10.55 or YTF03 peptide or gene segment or a reagent which recognizes one or the other, e.g., substrates or antibodies.

A kit for determining the binding affinity of a test compound to a BS10.55 or YTF03 protein would typically comprise a test compound; a labeled compound, e.g., an antibody having known binding affinity for the BS10.55 or YTF03 protein; a source of BS10.55 or YTF03 protein (naturally occurring or recombinant); and a means for separating bound from free labeled compound, such as a solid phase for immobilizing the BS10.55 or YTF03 protein. Once compounds are screened, those having suitable binding affinity to the BS10.55 or YTF03 protein can be evaluated in suitable biological assays, as are well known in the art, to determine whether they act as agonists or antagonists to a substrate. The availability of recombinant BS10.55 or YTF03 polypeptides also provide well defined standards for calibrating such assays.

A preferred kit for determining the concentration of, for example, a BS10.55 or YTF03 protein in a sample would typically comprise a labeled compound, e.g., antibody, having known binding affinity for the BS10.55 or YTF03 protein, a source of BS10.55 or YTF03 protein (naturally occurring or recombinant), and a means for separating the bound from free labeled compound, for example, a solid phase for immobilizing the BS10.55 or YTF03 protein. Compartments containing reagents, and instructions, will normally be provided.

Antibodies, including antigen binding fragments, specific for the BS10.55 or YTF03 protein, or fragments thereof, are useful in diagnostic applications to detect the presence of elevated levels of BS10.55 or YTF03 protein and/or its fragments. Such diagnostic assays can employ lysates, live cells, fixed cells, immunofluorescence, cell cultures, body fluids, and further can involve the detection of antigens related to the ligand in serum, or the like. Diagnostic assays may be homogeneous (without a separation step between free reagent and BS10.55 or YTF03 protein complex) or heterogeneous (with a separation step). Various commercial assays exist, such as radioimmunoassay (RIA), enzyme-linked immunosorbentassay (ELISA), enzyme immunoassay (EIA), enzyme-multiplied immunoassay technique (EMIT), substrate-labeled fluorescent immunoassay (SLFIA), and the like. For example, unlabeled antibodies can be employed by using a second antibody which is labeled and which recognizes the antibody to a BS10.55 or YTF03 protein or to a particular fragment thereof. Similar assays have also been extensively discussed in the literature. See, e.g., Harlow and Lane (1988) Antibodies: A Laboratory Manual, CSH Press, NY; Chan (ed.) (1987) Immunoassay: A Practical Guide Academic Press, Orlando, Fla. Price and Newman (eds.) (1991) Principles and Practice of Immunoassay Stockton Press, NY; and Ngo (ed.) (1988) Nonisotopic Immunoassay Plenum Press, NY.

Anti-idiotypic antibodies may have similar use to diagnose presence of antibodies against a BS10.55 or YTF03 protein, as such may be diagnostic of various abnormal states. For example, overproduction of BS10.55 or YTF03 protein may result in production of various immunological or other medical reactions which may be diagnostic of abnormal physiological states, e.g., in cell growth, activation, or differentiation.

Frequently, the reagents for diagnostic assays are supplied in kits, so as to optimize the sensitivity of the assay. For the subject invention, depending upon the nature of the assay, the protocol, and the label, either labeled or unlabeled antibody, or labeled BS10.55 or YTF03 protein is provided. This is usually in conjunction with other additives, such as buffers, stabilizers, materials necessary for signal production such as substrates for enzymes, and the like. Preferably, the kit will also contain instructions for proper use and disposal of the contents after use. Typically the kit has compartments for each useful reagent. Desirably, the reagents are provided as a dry lyophilized powder, where the reagents may be reconstituted in an aqueous medium providing appropriate concentrations of reagents for performing the assay.

Many of the aforementioned constituents of the drug screening and the diagnostic assays may be used without modification, or may be modified in a variety of ways. For example, labeling may be achieved by covalently or non-covalently joining a moiety which directly or indirectly provides a detectable signal. In any of these assays, the protein, test compound, BS10.55 or YTF03 protein, or antibodies thereto can be labeled either directly or indirectly. Possibilities for direct labeling include label groups: radiolabels such as ¹²⁵ I, enzymes (U.S. Pat. No. 3,645,090) such as peroxidase and alkaline phosphatase, and fluorescent labels (U.S. Pat. No. 3,940,475) capable of monitoring the change in fluorescence intensity, wavelength shift, or fluorescence polarization. Possibilities for indirect labeling include biotinylation of one constituent followed by binding to avidin coupled to one of the above label groups.

There are also numerous methods of separating the bound from the free antigen, or alternatively the bound from the free test compound. The BS10.55 or YTF03 protein can be immobilized on various matrices followed by washing. Suitable matrices include plastic such as an ELISA plate, filters, and beads. Methods of immobilizing the BS10.55 or YTF03 protein to a matrix include, without limitation, direct adhesion to plastic, use of a capture antibody, chemical coupling, and biotin-avidin. The last step in this approach usually involves the precipitation of enzyme/antibody or enzyme substrate complex by various methods including those utilizing, e.g., an organic solvent such as polyethylene glycol or a salt such as ammonium sulfate. Other suitable separation techniques include, without limitation, the fluorescein antibody magnetizable particle method described in Rattle, et al. (1984) Clin. Chem. 30:1457-1461, and the double antibody magnetic particle separation as described in U.S. Pat. No. 4,659,678.

Methods for linking proteins or their fragments to the various labels have been extensively reported in the literature and do not require detailed discussion here. Many of the techniques involve the use of activated carboxyl groups either through the use of carbodiimide or active esters to form peptide bonds, the formation of thioethers by reaction of a mercapto group with an activated halogen such as chloroacetyl, or an activated olefin such as maleimide, for linkage, or the like. Fusion proteins will also find use in these applications.

Another diagnostic aspect of this invention involves use of oligonucleotide or polynucleotide sequences taken from the sequence of a BS10.55 or YTF03 protein. These sequences can be used as probes for detecting levels of the BS10.55 or YTF03 protein message in samples from natural sources, or patients suspected of having an abnormal condition, e.g., immune problem. The preparation of both RNA and DNA nucleotide sequences, the labeling of the sequences, and the preferred size of the sequences has received ample description and discussion in the literature. Normally an oligonucleotide probe should have at least about 14 nucleotides, usually at least about 18 nucleotides, and the polynucleotide probes may be up to several kilobases. Various detectable labels may be employed, most commonly radionuclides, particularly ³² P. However, other techniques may also be employed, such as using biotin modified nucleotides for introduction into a polynucleotide. The biotin then serves as the site for binding to avidin or antibodies, which may be labeled with a wide variety of labels, such as radionuclides, fluorophores, enzymes, or the like. Alternatively, antibodies may be employed which can recognize specific duplexes, including DNA duplexes, RNA duplexes, DNA-RNA hybrid duplexes, or DNA-protein duplexes. The antibodies in turn may be labeled and the assay carried out where the duplex is bound to a surface, so that upon the formation of duplex on the surface, the presence of antibody bound to the duplex can be detected. The use of probes to the novel anti-sense RNA may be carried out using many conventional techniques such as nucleic acid hybridization, plus and minus screening, recombinational probing, hybrid released translation (HRT), and hybrid arrested translation (HART). This also includes amplification techniques such as polymerase chain reaction (PCR).

Diagnostic kits which also test for the qualitative or quantitative presence of other markers are also contemplated. Diagnosis or prognosis may depend on the combination of multiple indications used as markers. Thus, kits may test for combinations of markers. See, e.g., Viallet, et al. (1989) Progress in Growth Factor Res. 1:89-97.

XII. Substrate Identification

Having isolated a protease or oxidoreductase, methods exist for identifying a target substrate. For example, a candidate substrate can be contacted with a BS10.55 or YTF03 protein in an enzymatic reaction. The resulting cleavage or oxidoreduction product can be analyzed, e.g., using SDS-PAGE, HPLC, spectroscopy or other forms of analysis. For example, the molecular weight of a protease cleavage product should be compared against the molecular weights of the uncleaved substrate and the BS10.55 protein. The successful candidate substrate will exhibit a shift to a lower molecular weight. Analysis of the substrate should determine what site specificity may exist for the enzyme under the tested conditions. Alternatively, if the protease acts by transforming an inactive substrate to the active form, the resulting activity can be assayed, e.g., by the result of the activated factor, e.g., proliferation, apoptosis, or activation of a target cell.

Sequence specificity of products may allow search through sequence databases to identify candidate proteins as physiologically natural substrates. Alternatively, the protease may be involve in antigen processing and presentation to appropriate immune cells.

Correspondingly, various candidate oxidation or reduction substrates may be evaluated. A spectroscopic or other method may indicate what the enzyme has specificity for acting on.

The broad scope of this invention is best understood with reference to the following examples, which are not intended to limit the invention to specific embodiments.

EXAMPLES I. General Methods

Many of the standard methods below are described or referenced, e.g., in Maniatis, et al. (1982) Molecular Cloning. A Laboratory Manual Cold Spring Harbor Laboratory, Cold Spring Harbor Press, NY; Sambrook, et al. (1989) Molecular Clonina: A Laboratory Manual (2d ed.) Vols. 1-3, CSH Press, NY; Ausubel, et al., Biology Greene Publishing Associates, Brooklyn, NY; or Ausubel, et al. (1987 and Supplements) Current Protocols in Molecular Biology Wiley/Greene, NY; Innis, et al. (eds.) (1990) PCR Protocols: A Guide to Methods and Applications Academic Press, NY. Methods for protein purification include such methods as ammonium sulfate precipitation, column chromatography, electrophoresis, centrifugation, crystallization, and others. See, e.g., Ausubel, et al. (1987 and periodic supplements); Deutscher (1990) "Guide to Protein Purification," Methods in Enzymology vol. 182, and other volumes in this series; and manufacturer's literature on use of protein purification products, e.g., Pharmacia, Piscataway, N.J., or Bio-Rad, Richmond, Calif. Combination with recombinant techniques allow fusion to appropriate segments (epitope tags), e.g., to a FLAG sequence or an equivalent which can be fused, e.g., via a protein-removable sequence. See, e.g., Hochuli (1989) Chemische Industrie 12:69-70; Hochuli (1990) "Purification of Recombinant Proteins with Metal Chelate Absorbent" in Setlow (ed.) Genetic Engineering. Principle and Methods 12:87-98, Plenum Press, N.Y.; and Crowe, et al. (1992) OIAexDress: The High Level Expression& Protein Purification System QUIAGEN, Inc., Chatsworth, Calif.

Standard immunological techniques are described, e.g., in Coligan (1991) Current Protocols in Immunology Wiley/Greene, NY; and Methods in Enzymology volumes. 70, 73, 74, 84, 92, 93, 108, 116, 121, 132, 150, 162, and 163. Assays for neural cell biological activities are described, e.g., in Wouterlood (ed. 1995) Neuroscience Protocols modules 10, Elsevier; Methods in Neurosciences Academic Press; and Neuromethods Humana Press, Totowa, N.J. Methodology of developmental systems is described, e.g., in Meisami (ed.) Handbook of Human Growth and Developmental Biology CRC Press; and Chrispeels (ed.) Molecular Techniques and Approaches in Developmental Biology Interscience.

FACS analyses are described in Melamed, et al. (1990) Flow Cytometry and Sorting Wiley-Liss, Inc., New York, N.Y.; Shapiro (1988) Practical Flow Cytometry Liss, New York, N.Y.; and Robinson, et al. (1993) Handbook of Flow Cytometry Methods Wiley-Liss, New York, N.Y.

II. Isolation of Human BS10.55 or YTF03 Protein

A clone encoding the human BS10.55 or YTF03 protein is isolated from a natural source by many different possible methods. Given the sequences provided herein, PCR primers or hybridization probes are selected and/or constructed to isolate a nucleic acid, e.g., genomic DNA segments or cDNA reverse transcripts. Appropriate cell sources include human tissues, e.g., brain libraries. Tissue distribution below also suggests source tissues. Genetic and polymorphic or allelic variants are isolated by screening a population of individuals.

The BS10.55 gene was originally isolated from human germinal center dendritic cells (Grouard, et al. (1996) Nature 384:364-367) stimulated by overnight incubation with the anti-CD40 monoclonal antibody G28-5 (provided by E. A. Clark and J. F. Cantaloube). The PCR fragments were cloned via T-overhang into pCRII (Invitrogen).

cDNA was prepared from 3×10⁶ germinal center dendritic cells purified from human tonsils to 99% homogeneity and CD40 activated. The cDNA was cut by the RsaI restriction enzyme and subtracted against cDNA from the cell-line U937. U937 (ATCC CRL-1593) is a human is histiocytic lymphoma expressing many monocyte-like characteristics. The subtraction procedure described recently by Diatchenko, et al. (1996) Proc. Natl. Acad. Sci. USA 93:6025-6030, was used with an adaptation to low cell number. The clone BS10.55 was discovered by random sequencing of the subtracted germinal center dendritic cell library. The cDNA was extended by RACE (rapid amplification of cohesive ends) using cDNA from in vitro generated dendritic cells. Caux, et al. (1992) Nature 360:258-261.

The YTF03 gene was found in a cDNA library made from a population of 90% CD1a+ dendritic cells, proliferated in TNF-α and GM-CSF.

PCR based detection is performed by standard methods, preferably using appropriate primers from opposite ends of the coding sequence, but flanking segments might be selected for specific purposes.

Alternatively, hybridization probes are selected. Particular AT or GC contents of probes are selected depending upon the expected homology and mismatching expected. Appropriate stringency conditions are selected to balance an appropriate positive signal to background ratio. Successive washing steps are used to identify clones of greater homology.

Further clones will be isolated, e.g., using an antibody based selection procedure. Standard expression cloning methods are applied including, e.g., FACS staining of membrane associated expression product. The antibodies are used to identify clones producing a recognized protein. Alternatively, antibodies are used to purify a BS10.55 or YTF03 protein, with protein sequencing and standard means to isolate a gene encoding that protein.

Genomic or cDNA sequence based methods will also allow for identification of sequences naturally available, or otherwise, which exhibit homology to the provided sequences.

III. Isolation of Mouse BS10.55 or YTF03 Protein

Similar methods are used as above to isolate an appropriate BS10.55 or YTF03 protein gene. Similar source materials as indicated above are used to isolate natural genes, including genetic, polymorphic, allelic, or strain variants. Species variants are also isolated using similar methods. Various sequence databases may suggest related or counterpart sequences. See, e.g., Capone, et al. (1996) J. Immunol. 157:969-973.

IV. Isolation of an Avian BS10.55 or YTF03 Protein Clone

An appropriate avian source is selected as above. Similar methods are utilized to isolate other species variants, though the level of similarity will typically be lower for avian BS10.55 or YTF03 protein as compared to a human to mouse sequence.

V. Expression; Purification; Characterization

With an appropriate clone from above, the coding sequence is inserted into an appropriate expression vector. This may be in a vector specifically selected for a prokaryote, yeast, insect, or higher vertebrate, e.g., mammalian expression system. Standard methods are applied to produce the gene product, preferably as a soluble secreted molecule, but will, in certain instances, also be made as an intracellular protein. Intracellular proteins typically require cell lysis to recover the protein, and insoluble inclusion bodies are a common starting material for further purificiation.

With a clone encoding a vertebrate BS10.55 or YTF03 protein, recombinant production means are used, although natural forms may be purified from appropriate sources, e.g., expressing cell lines. The protein product is purified by standard methods of protein purification, in certain cases, e.g., coupled with immunoaffinity methods. Immunoaffinity methods are used either as a purification step, as described above, or as a detection assay to determine the partition properties of the protein.

Preferably, the protein is secreted into the medium, and the soluble product is purified from the medium in a soluble form. Standard purification techniques applied to soluble proteins are then applied, with enzyme assays or immunodetection methods useful for following where the protease purifies. Alternatively, as described above, inclusion bodies from prokaryotic expression systems are a useful source of material. Typically, the insoluble protein is solubilized from the inclusion bodies and refolded using standard methods. Purification methods are developed as described above.

In certain embodiments, the protein is made in a eukaryotic cell which glycosylates the protein normally.

The purification methods may be affected thereby, as may biological activities. The intact protein can be processed to release the protein domain, probably due to a cleavage event. While recombinant protein appears to be processed, the physiological processes which normally do such in native cells remain to be determined.

The product of the purification method described above is characterized to determine many structural features.

Standard physical methods are applied, e.g., amino acid analysis and protein sequencing. The resulting protein is subjected to CD spectroscopy and other spectroscopic methods, e.g., NMR, ESR, mass spectroscopy, etc. The product is characterized to determine its molecular form and size, e.g., using gel chromatography and similar techniques. Understanding of the chromatographic properties will lead to more gentle or efficient purification methods.

Prediction of glycosylation sites may be made, e.g., as reported in Hansen, et al. (1995) Biochem. J. 308:801-813. Standard methods for assaying oxidoreductases, particularly monoamine oxidases, are found, e.g., in Methods in Enzymology; Moser, et al. (1995) J. Bioenerg. 27:263-274; Lawen, et al. (1994) Mol. Asiects Med. 15:supp:13-27; and Koishi, et al. (1997) J. Biol. Chem. 272:2570-2577.

VI. Preparation of Antibodies Against Vertebrate BS10.55 or YTF03 Protein

With protein produced and purified, as above, animals are immunized to produce antibodies. Polyclonal antiserum may be raised using non-purified antigen, though the resulting serum will exhibit higher background levels. Preferably, the antigen is purified using standard protein purification techniques, including, e.g., affinity chromatography using polyclonal serum indicated above. Presence of specific antibodies is detected using defined synthetic peptide fragments.

Alternatively, polyclonal serum is raised against a purified antigen, purified as indicated above, or using synthetic peptides. A series of overlapping synthetic peptides which encompass all of the full length sequence, if presented to an animal, will produce serum recognizing most linear epitopes on the protein. Such an antiserum is used to affinity purify protein. This purified protein, in turn, may be used to immunize another animal to produce another antiserum preparation.

Standard techniques are used to generate induce monoclonal antibodies to either unpurified antigen, or, preferably, purified antigen.

VII. Cellular and Tissue Distribution

Distribution of the protein or gene products are determined, e.g., using immunohistochemistry with an antibody reagent, as produced above, or by screening for nucleic acids encoding the BS10.55 or YTF03 protein. Either hybridization or PCR methods are used to detect DNA, cDNA, or message content. Histochemistry allows determination of the specific cell types within a tissue which express higher or lower levels of message or DNA. Antibody techniques are useful to quantitate protein in a biological sample, including a liquid or tissue sample. Immunoassays are developed to quantitate protein.

Hybridization techniques were applied to the tissue types in described above with positive or negative results, as indicated. The commercial tissue blots may have more significant cellular contamination from other cells, e.g., from blood or other cells which are in the tissue.

By PCR the BS10.55 sequence is expressed in germinal center dendritic cells and in vitro generated dendritic cells, either stimulated or non-stimulated (Caux, et al. (1992) Nature 360:258-261). A faint signal may have been detected in CHA kidney epithelial carcinoma cell line. No detectable signal was observed in the hematopoietic precursor line TF1, Jurkat T cell line, MRC5 lung fibroblast sarcoma cell line, JY B cell line, or U937 pre-monocytic cell line.

By Northern blot analyses a 2.9 kb message was detected in RNA from adult small intestine, but not in similar abundance in any of adult PBL, colon, ovary, testis, prostate, thymus, spleen, pancreas, kidney, skeletal muscle, liver, lung, placenta, brain, or heart. No signal was detected in resting DC, activated DC, monocytes, granulocytes, resting PBL, activated PBL, or B cells.

By PCR analysis, expression of YTF03 is strongest in monocyte M6 (elutriated monocytes activated with LPS 6 h), 70% DC (resting 70% CD1a+ dendritic cells, proliferated in TNF-α and GM-CSF), D1 (dendritic cells stimulated 1 h in PMA and ionomycin), D6 (dendritic cells stimulated 6 h in PMA and ionomycin), HY06R (resting Th1 clone), and HY06α (activated with anti-peptide, anergic clone). Expression is almost as strong in Monocyte C+ (elutriated monocytes activated with LPS, IFN-γ, and IL-10), D5 DC (resting dendritic cells cultured 5 d in GM-CSF and IL-4), DC mix (dendritic cells stimulated with a mixture of cytokines), and HY06A (activated with anti-CD28 and anti-CD3).

Expression of YTF03 is not as strong in C- (elutriated monocyte activated with LPS, IFN-γ, and anti-IL-10), M1 (elutriated monocytes activated with LPS 1 h), PBMCA (activated using T cell stimulation conditions, with anti-CD3 and PMA), HY935A (activated with anti-CD28 and anti-CD3), BC (pool of EBV transformed lines), SplenoA (splenocytes activated using B cell stimulating conditions, with anti-CD40 and IL-4), NKR (resting NK cell pool), NKA (NK cell pool activated 6 h with PMass and ionomycin; NKA is slightly stronger than NKR), and spleen. Signal is much weaker in U937 (pre-monocytic cell line), brain, small intestine, and very faint in HY935R (resting Th2 clone), adipose, and placenta. It is questionable whether YTF03 is expressed in kidney. No expression was detected in: PBMCR (resting PBMC), SplenoR (resting splenocytes), lung, liver, heart, gall bladder, ovary, testes, uterus, and RAW. In summary, YTF03 is expressed mainly in DC and monocytes, and to a lesser extent in some T cells.

VIII. Structure Activity Relationship

Information on the criticality of particular residues is determined using standard procedures and analysis. Standard mutagenesis analysis is performed, e.g., by generating many different variants at determined positions, e.g., at the positions identified above, and evaluating biological activities of the variants. This may be performed to the extent of determining positions which modify activity, or to focus on specific positions to determine the residues which can be substituted to either retain, block, or modulate biological activity.

Alternatively, analysis of natural variants can indicate what positions tolerate natural mutations. This may result from populational analysis of variation among individuals, or across strains or species. Samples from selected individuals are analyzed, e.g., by PCR analysis and sequencing. This allows evaluation of population polymorphisms.

IX. Additional Genes

One additional gene has been characterized and described. See Table 3. Nucleic acids may be used, as described above, to express and assay biological samples for hybridizing or related nucleic acids. They may also be used to express recombinant protein, which can be enriched or purified for the expression products. Those products can be used to further characterize biochemically and physiologically the protein. Antibodies may be made, both for diagnostic purposes, and to modulate biological activity of the protein itself. Such reagents may also have therapeutic applications, and can be used as described above. Protein and nucleic acid variants will be useful as described above.

                                      TABLE 3                                      __________________________________________________________________________     APD08 gene from a human, characteristic of primate embodiments.                  The nucleotide and predicted amino acid sequence. SEQ ID NO: 5 and 6.        The                                                                              coding sequence runs from about 69 to 1928.                                    The encoded protein contains two domains which each exhibit homology          to a GTPase. The amino terminal GTPase domain is similar to the Rho           family                                                                           members, most of which are smaller proteins. The cDNA appears to be          widely                                                                           expressed, but sequence should be characteristic of genetic origin, and      may                                                                             be useful, e.g., in differentiating genetic origin, or genetic relation.       Thus, the sequence may be useful in identifying human tissues. Related         gene sequences by comparison search using standard algorithms include,         e.g., those identified by GenBank numbers H07061, H13318, N52992,             H96929,                                                                          H07062, R40014, and R13644.                                                  __________________________________________________________________________       GGGTCGACCA CGCGTCCGAC CAGGTCGGGG CCGGGTTCCG GGTCGGGGAG CGGCTCCGGG   60                                                 - CGGCAGCT ATG AGG CGG GAC GTG                                               CGC ATC CTG TTA CTG GGC GAG GCC                                                CAG  110                                          Met Arg Arg Asp Val Arg Ile Leu Leu Leu Gly Glu Ala Gln                                                                 1               5                                                               10                           - GTG GGG AAG ACG TCG CTG ATC CTG TCC CTG GTG GGC GAG GAG TTC CCC  158        Val Gly Lys Thr Ser Leu Ile Leu Ser Leu Val Gly Glu Glu Phe Pro                                                        15                  20                                                               25                  30 -                                               - GAG GAG GTC CCT CCC CGC GCG GAG                                              GAG ATC ACG ATC CCC GCG GAC GTC                                                206                                      Glu Glu Val Pro Pro Arg Ala Glu Glu Ile Thr Ile Pro Ala Asp Val                                                                        35                                                               40                  45                                                       - ACC CCG GAG AAG GTG CCC ACC                                                CAC ATC GTG GAC TAC TCA GAA GCC                                                GAG  254                                 Thr Pro Glu Lys Val Pro Thr His Ile Val Asp Tyr Ser Glu Ala Glu                                                               50                  55                                                               60                         - CAG ACG GAC GAG GAG CTG CGG GAG GAG ATC CAC AAG GCA AAC GTG GTG  302        Gln Thr Asp Glu Glu Leu Arg Glu Glu Ile His Lys Ala Asn Val Val                                                                65                  70                                                               75                        - TGT GTG GTG TAT GAC GTC TCT GAG GAG GCC ACC ATT GAG AAG ATT CGA  350        Cys Val Val Tyr Asp Val Ser Glu Glu Ala Thr Ile Glu Lys Ile Arg                                                            80                  85                                                               90                            - ACT AAG TGG ATC CCA CTG GTG AAT GGG GGG ACC ACG CAG GGG CCC AGG  398        Thr Lys Trp Ile Pro Leu Val Asn Gly Gly Thr Thr Gln Gly Pro Arg                                                        95                 100                                                              105                 110                                                   - GTG CCC ATC ATC CTA GTG GGC                                                AAC AAG TCA GAC CTG CGG TCG GGG                                                AGC  446                                 Val Pro Ile Ile Leu Val Gly Asn Lys Ser Asp Leu Arg Ser Gly Ser                                                                       115                                                              120                 125                                                       - TCC ATG GAG GCC GTG CTC CCC                                                ATC ATG AGC CAG TTT CCC GAG ATT                                                GAG  494                                 Ser Met Glu Ala Val Leu Pro Ile Met Ser Gln Phe Pro Glu Ile Glu                                                                   130                                                               135                 140                   - ACC TGC GTG GAG TGT TCG GCC AAG AAC CTG AGG AAC ATC TCA GAG CTG  542        Thr Cys Val Glu Cys Ser Ala Lys Asn Leu Arg Asn Ile Ser Glu Leu                                                               145                 150                                                              155                        - TTC TAC TAC GCC CAG AAG GCC GTC CTG CAT CCC ACA GCC CCC CTC TAT  590        Phe Tyr Tyr Ala Gln Lys Ala Val Leu His Pro Thr Ala Pro Leu Tyr                                                           160                 165                                                              170                            - GAC CCT GAG GCC AAG CAG TTG AGG CCC GCG TGC GCC CAG GCG CTG ACG  638        Asp Pro Glu Ala Lys Gln Leu Arg Pro Ala Cys Ala Gln Ala Leu Thr                                                       175                 180                                                              185                 190                                                   - CGC ATC TTC AGG CTC TCA GAT                                                CAG GAC CTC GAC CAG GCG CTC AGT                                                GAC  686                                 Arg Ile Phe Arg Leu Ser Asp Gln Asp Leu Asp Gln Ala Leu Ser Asp                                                                       195                                                              200     `           205                                                       - GAA GAG CTC AAC GCT TTC CAG                                                CAG AAA TCC TGC TTT GGG CAC CCC                                                CTG  734                                 Glu Glu Leu Asn Ala Phe Gln Gln Lys Ser Cys Phe Gly His Pro Leu                                                                   210                                                               215                 220                   - GCC CCG CAG GCC CTG GAG GAC GTC AAG ACG GTG GTG TGC AGG AAC GTC  782        Ala Pro Gln Ala Leu Glu Asp Val Lys Thr Val Val Cys Arg Asn Val                                                               225                 230                                                              235                        - GCG GGC GGC GTC CGG GAG GAC CGG CTG ACC CTG GAT GGT TTC CTC TTC  830        Ala Gly Gly Val Arg Glu Asp Arg Leu Thr Leu Asp Gly Phe Leu Phe                                                           240                 245                                                              250                            - CTG AAC ACG CTC TTC ATC CAG CGC GGC CGG CAC GAG ACC ACC TGG ACC  878        Leu Asn Thr Leu Phe Ile Gln Arg Gly Arg His Glu Thr Thr Trp Thr                                                       255                 260                                                              265                 270                                                   - ATC CTC CCG CGC TTC GGC TAC                                                AGC GAT GCC CTG GAG CTC ACT GCG                                                GAC  926                                 Ile Leu Arg Arg Phe Gly Tyr Ser Asp Ala Leu Glu Leu Thr Ala Asp                                                                       275                                                              280                 285                                                       - TAT CTC TCC CCT CTG ATC CAC                                                GTG CCC CCC GGC TGC AGC ACG GAG                                                CTC  974                                 Tyr Leu Ser Pro Leu Ile His Val Pro Pro Gly Cys Ser Thr Glu Leu                                                                   290                                                               295                 300                   - AAC CAC CTT GGC TAC CAG TTT GTG CAG AGA GTG TTT GAG AAG CAC GAC 1022        Asn His Leu Gly Tyr Gln Phe Val Gln Arg Val Phe Glu Lys His Asp                                                               305                 310                                                              315                        - CAG GAC CGC GAC GGC GCC CTC TCG CCC GTG GAG CTC CAA AGC CTT TTC 1070        Gln Asp Arg Asp Gly Ala Leu Ser Pro Val Glu Leu Gln Ser Leu Phe                                                           320                 325                                                               330                           - AGT GTC TTC CCA GCA GCG CCC TGG GGC CCC GAG CTC CCA CGC ACA GTC 1118        Ser Val Phe Pro Ala Ala Pro Trp Gly Pro Glu Leu Pro Arg Thr Val                                                       335                 340                                                              345                 350                                                   - CGC ACA GAG GCC GGC CGG TTC                                                CCC CTG CAC GGA TAC CTC TGC CAG                                                TGG 1166                                 Arg Thr Glu Ala Gly Arg Leu Pro Leu His Gly Tyr Leu Cys Gln Trp                                                                       355                                                              360                 365                                                       - ACC CTC GTC ACC TAC CTG GAC                                                GTC CGG AGC TGC CTT GGA CAC CTA                                                GGC 1214                                 Thr Leu Val Thr Tyr Leu Asp Val Arg Ser Cys Leu Gly His Leu Gly                                                                   370                                                               375                 380                   - TAC CTG GGC TAC CCC ACC CTC TGT GAG CAG GAC CAG GCC CAT GCC ATC 1262        Tyr Leu Gly Tyr Pro Thr Leu Cys Glu Gln Asp Gln Ala His Ala Ile                                                               385                 390                                                              395                        - ACA GTC ACT CGT GAG AAG AGG CTG GAC CAG GAG AAG GGA CAG ACG CAG 1310        Thr Val Thr Arg Glu Lys Arg Leu Asp Gln Glu Lys Gly Gln Thr Gln                                                           400                 405                                                              410                            - TGG AGC GTC CTC CTG TGC AAG GTG GTA GGG GCC CGT GGA GTG GGC AAG 1358        Trp Ser Val Leu Leu Cys Lys Val Val Gly Ala Arg Gly Val Gly Lys                                                       415                 420                                                              425                 430                                                   - TCT GCC TTC CTG CAG GCC TTT                                                CTC GGC CGC GGC CTG GGG CAC CAG                                                GAC 1406                                 Ser Ala Phe Leu Gln Ala Phe Leu Gly Arg Gly Leu Gly His Gln Asp                                                                       435                                                              440                 445                                                       - ACG AGG GAG CAG CCT CCC GGC                                                TAC GCC ATC GAC ACG GTG CAG GTC                                                AAT 1454                                 Thr Arg Glu Gln Pro Pro Gly Tyr Ala Ile Asp Thr Val Gln Val Asn                                                                   450                                                               455                 460                   - GGA CAG GAG AAG TAC TTG ATC CTC TGT GAG GTG GGC ACA GAT GGT CTG 1502        Gly Gln Glu Lys Tyr Leu Ile Leu Cys Glu Val Gly Thr Asp Gly Leu                                                               465                 470                                                              475                        - CTG GCC ACA TCG CTG GAC GCC ACC TGT GAC GTT GCC TGC TTG ATG TTT 1550        Leu Ala Thr Ser Leu Asp Ala Thr Cys Asp Val Ala Cys Leu Met Phe                                                           480                 485                                                              490                            - GAT GGC AGT GAC CCA AAG TCC TTT GCA CAT TGT GCC AGC GTC TAC AAG 1598        Asp Gly Ser Asp Pro Lys Ser Phe Ala His Cys Ala Ser Val Tyr Lys                                                       495                 500                                                              505                 510                                                   - CAC CAT TAC ATG GAC GGG CAG                                                ACC CCC TGC CTC TTT GTC TCC TCC                                                AAG 1646                                 His His Tyr Met Asp G1y Gln Thr Pro Cys Leu Phe Val Ser Ser Lys                                                                       515                                                              520                 525                                                       - GCC GAC CTG CCC GAA GGT GTC                                                GCC GTG TCT GGC CCA TCA CCG GCC                                                GAG 1694                                 Ala Asp Leu Pro Glu Gly Val Ala Val Ser Gly Pro Ser Pro Ala Glu                                                                   530                                                               535                 540                   - TTT TGC CGC AAG CAC CGG CTA CCC GCT CCC GTG CCG TTC TCC TGT GCT 1742        Phe Cys Arg Lys His Arg Leu Pro Ala Pro Val Pro Phe Ser Cys Ala                                                               545                 550                                                              555                        - GGC CCA GCC GAG CCC AGC ACC ACC ATC TTC ACC CAG CTC GCC ACC ATG 1790        Gly Pro Ala Glu Pro Ser Thr Thr Ile Phe Thr Gln Leu Ala Thr Met                                                           560                 565                                                              570                            - GCC GCC TTC CCA CAT TTG GTC CAC GCA GAG CTG CAT CCC TCT TCC TTC 1838        Ala Ala Phe Pro His Leu Val His Ala Glu Leu His Pro Ser Ser Phe                                                       575                 58O                                                              585                 590                                                   - TGG CTC CGG GGG CTG CTG GGG                                                GTT GTC GGG GCC GCC GTG GCC GCA                                                GTC 1886                                 Trp Leu Arg Gly Leu Leu Gly Val Val Gly Ala Ala Val Ala Ala Val                                                                       595                                                              600                 605                                                       - CTC AGC TTC TCA CTC TAC AGG                                                GTC CTG GTG AAG AGC CAG TGA 1928                                                Leu Ser Phe Ser Leu Tyr Arg Val                                               Leu Val Lys Ser Gln  *                               610                 615                 620                         - GGCCCCTGGT ACCCAAGCCC CCTCCCCTGA CCTGGGTGTG CCTCGCTGCT GGGGCTCTGC                                                 1988                                      - ACTTTTTGTT TCTGAAGGCA GTCGATCTGC AGCGGGGCCT TATGCTGCCA TGCACTGCCC                                                 2108                                      - TGGCTCCTGC CGGACCCCCA GGGTGGGCCG TGGCAGGTGG CTGAGCAGGA GCTCCCAAGT                                                 2168                                      - GCCGGCCACC GCTGTCAGGG ATTGCCCACC CCTGGGCATC ATGTGTGTGG GGCCGGGGAG                                                 2228                                      - CACAGGTGTG GGAGCTGGTG ACCCCAGACC CAGAATTCTC AGGGCTCTAC CCCCCTTTCC                                                 2288                                      - TGGTCCTAGG TGGCCAGTGG GTATGAGGAG GGCTGGAAGG CAGAGCTTTG GGCCAAAAGC                                                 2348                                      - AGGCGTTGGG GGGTCCCCCC TCAAGTTTGG AGCCGTTTCC GTGGTTGTAG CAGAGGACCG                                                 2408                                      - GAGGTTGGGT TCCTGATTAA ACTTCACTGT GTGTTTTCTA TCTCGGATCC CAGTCTCTGA                                                 2468                                      - AGACAACTTG CTTTGATTCA ACCTAAAAAA AAAAAAAAAA AAAAAAAA 2516                 __________________________________________________________________________

The present invention provides a binding compound comprising an antibody binding site which specifically binds to primate APD08 protein; a nucleic acid comprising sequence encoding at least 12 amino acids of primate APD08 protein; a substantially pure protein which is specifically recognized by the above antibody binding site; a substantially pure primate APD08 protein or peptide thereof; and a fusion protein comprising a 30 amino acid sequence portion of primate APD08 protein sequence.

In certain binding compound embodiments, the antibody binding site is specifically immunoreactive with a protein of SEQ ID NO: 6; is raised against a purified or recombinantly produced primate APD08 protein; is immunoselected on a substantially purified or recombinantly produced primate APD08 protein; is in a monoclonal antibody, Fab, or F(ab)2; is detectably labeled; is attached to a solid substrate; is from a rabbit or mouse; binds with a Kd of at least about 300 μM; is fused to another protein segment; is in a chimeric antibody; or is coupled to another chemical moiety.

The invention also provides a method of making an antigen-antibody complex, comprising a step of contacting a primate biological sample to a specific binding antibody described. In preferred embodiments, the method further includes steps to purify the antigen or antibody.

Alternative embodiments provide an antibody binding site wherein the binding site is detected in a biological sample by a method comprising the steps of contacting a binding agent having an affinity for APD08 protein with the biological sample; incubating the binding agent with the biological sample to form a binding agent:APD08 protein complex; and detecting the complex. In certain embodiments, the biological sample is human, and the binding agent is an antibody.

The invention also provides kits containing a composition described above and instructional material for the use of the composition; or segregation of the composition into a container. Typically, the kit is used to make a qualitative or quantitative analysis.

The invention also embraces a cell comprising an antibody described above; a cell transfected with a nucleic acid described above; or a cell comprising a fusion protein described above.

In nucleic acid embodiments, the nucleic acid may encode a polypeptide which specifically binds an antibody generated against an immunogen selected from the group consisting of the mature polypeptide of SEQ ID NO: 6. Alternatively, the nucleic acid may encode at least 12 amino acids of SEQ ID NO: 6; comprise sequence of at least about 39 nucleotides selected from protein coding portions of SEQ ID NO: 5; hybridize to SEQ ID NO: 5 under stringent wash conditions of at least 45° C. and less than about 150 mM salt; comprise sequence made by a synthetic method; be an expression vector; be detectably labeled; be attached to a solid substrate; be from human; bind with a Kd of at least about 300 μM; be fused to another nucleic acid segment; be coupled to another chemical moiety; be operably associated with promoter, ribosome binding site, or poly-A addition site; be a PCR product; be transformed into a cell, including a bacterial cell; be in a sterile composition; be capable of selectively hybridizing to a nucleic acid encoding an APD08 protein; comprise a natural sequence; comprise a mature protein coding segment of SEQ ID NO: 5; encode a GTPase active portion of APD08; be detected in a biological sample by a method comprising: contacting a biological sample with a nucleic acid probe capable of selectively hybridizing to said nucleic acid, incubating the nucleic acid probe with the biological sample to form a hybrid of the nucleic acid probe with complementary nucleic acid sequences present in the biological sample; and determining the extent of hybridization of the nucleic acid probe to the complementary nucleic acid sequences, including the method where the nucleic acid probe is capable of hybridizing to a nucleic acid encoding a mature polypeptide of SEQ ID NO 6.

In protein or polypeptide embodiments, the protein may bind with a Kd of at least about 300 μM to an antibody generated against an immunogen of the polypeptides of SEQ ID NO: 6; be immunoselected on an antibody which selectively binds a polypeptide of SEQ ID NO: 6; comprise sequence of at least 12 contiguous residues of SEQ ID NO: 6; exhibit a post-translational modification pattern distinct from natural APD08; be 3-fold or fewer substituted from natural sequence; be recombinantly produced; be denatured; have sequence of full length natural polypeptide; be detectably labeled; be attached to a solid substrate; be from human; be in a sterile composition; be fused to another protein segment; be coupled to another chemical moiety; comprise at least a fragment of at least 32 amino acid residues from a human APD08 protein; comprise mature polypeptide sequence of SEQ ID NO 6; be a soluble protein; be a naturally occurring protein; or be a GTPase active portion of APD08.

The invention also provides an isolated protein which specifically binds to an antibody generated against an immunogen which is the full length polypeptide of SEQ ID NO: 6. Preferably such protein binds to the antibody with a Kd of at least about 300 μm; is immunoselected on an antibody which selectively binds a polypeptide of SEQ ID NO: 6; comprises sequence of at least 12 contiguous residues of SEQ ID NO: 6; exhibits a post-translational modification pattern distinct from natural APD08; is 3-fold or fewer substituted from natural.sequence; is recombinantly produced; is denatured; has sequence of full length natural polypeptide; is detectably labeled; is attached to a solid substrate; is from human; is in a sterile composition; is fused to another protein segment; is coupled to another chemical moiety; comprises at least a fragment of at least 32 amino acid residues from a human APD08 protein; comprises mature polypeptide sequence selected from SEQ ID NO 6; is a soluble protein; or comprises a GTPase activity of APD08.

In certain other embodiments, the invention embraces a fusion protein described above, which comprises sequence from an enzymatically active portion of SEQ ID NO: 6. Preferably such protein binds with a Kd of at least about 300 μM to an antibody generated against an immunogen having sequence of a polypeptide of SEQ ID NO. 6; is immunoselected on an antibody which selectively binds a polypeptide of SEQ ID NO: 6; comprises sequence of at least 12 contiguous residues of SEQ ID NO: 6; is recombinantly produced; is denatured; has sequence of full length natural polypeptide; is detectably labeled; is attached to a solid substrate; comprises sequence from human; is in a sterile composition; is fused to another protein segment; is coupled to another chemical moiety; comprises at least a fragment of at least 32 amino acid residues from a human APD08 protein; comprises mature polypeptide sequence from SEQ ID NO: 6; is a soluble protein; or comprises a GTPase activity of APD08.

The invention also provides a substantially pure protein described above which comprises a GTPase activity of APD08.

APD08 is tested for GTPase activity by methods well known in the art. Assays are described or referred to in, e.g., Dickey, et al. (eds. 1993) GTPases in Biology, vol. 108, parts I and II, Springer-Verlag, New York, N.Y.; Balch, et al. (eds. 1995) Meth. Enzymol. Vols. 255-257, Academic Press, San Diego, Calif.; Tapon, et al. (1997) Curr. Opin. Cell Biol. 9:86-92; Hotchin, et al. (1996) Cancer Surv. 27:311-322; Symons (1996) Trends Biochem Sci. 21:178-181; Hilgenfeld (1995) Curr Opin. Struct. Biol. 5:810-817; Nuoffer, et al. (1994) Annu. Rev. Biochem. 63:949-990; Spaargaren, et al. (1995) Gene Exor. 4:345-356; and Hall (1992) Mol. Cell. Biol. 3:475-479. Based upon this activity, the enzyme will be useful in screening for agonists and antagonists, and in modulating related biochemistry or metabolism. Similar methods to those described above will be used to identify the cells and tissue specificity of expression.

All references cited herein are incorporated herein by reference to the same extent as if each individual publication or patent application was specifically and individually indicated to be incorporated by reference in its entirety for all purposes.

Many modifications and variations of this invention can be made without departing from its spirit and scope, as will be apparent to those skilled in the art. The specific embodiments described herein are offered by way of example only, and the invention is to be limited only by the terms of the appended claims, along with the full scope of equivalents to which such claims are entitled.

    __________________________________________________________________________     #             SEQUENCE LISTING                                                    - -  - - (1) GENERAL INFORMATION:                                              - -    (iii) NUMBER OF SEQUENCES: 6                                            - -  - - (2) INFORMATION FOR SEQ ID NO:1:                                      - -      (i) SEQUENCE CHARACTERISTICS:                                                  (A) LENGTH: 2280 base - #pairs                                                 (B) TYPE: nucleic acid                                                         (C) STRANDEDNESS: single                                                       (D) TOPOLOGY: linear                                                  - -     (ii) MOLECULE TYPE: cDNA                                               - -     (ix) FEATURE:                                                                   (A) NAME/KEY: CDS                                                              (B) LOCATION: 61..1470                                                - -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:1:                                - - CGCCCGGGCA GGTGAGAAAT TGGAGAAGAT AAAACTGGAC ACTGGGGAGA CC -             #ACAACTTC     60                                                                  - - ATG CTG CGT GGG ATC TCC CAG CTA CCT GCA GT - #G GCC ACC ATG TCT         TGG      108                                                                     Met Leu Arg Gly Ile Ser Gln Leu Pro Ala Va - #l Ala Thr Met Ser Trp             1               5 - #                 10 - #                 15               - - GTC CTG CTG CCT GTA CTT TGG CTC ATT GTT CA - #A ACT CAA GCA ATA GCC           156                                                                        Val Leu Leu Pro Val Leu Trp Leu Ile Val Gl - #n Thr Gln Ala Ile Ala                         20     - #             25     - #             30                   - - ATA AAG CAA ACA CCT GAA TTA ACG CTC CAT GA - #A ATA GTT TGT CCT AAA           204                                                                        Ile Lys Gln Thr Pro Glu Leu Thr Leu His Gl - #u Ile Val Cys Pro Lys                     35         - #         40         - #         45                       - - AAA CTT CAC ATT TTA CAC AAA AGA GAG ATC AA - #G AAC AAC CAG ACA GAA           252                                                                        Lys Leu His Ile Leu His Lys Arg Glu Ile Ly - #s Asn Asn Gln Thr Glu                 50             - #     55             - #     60                           - - AAG CAT GGC AAA GAG GAA AGG TAT GAA CCT GA - #A GTT CAA TAT CAG ATG           300                                                                        Lys His Gly Lys Glu Glu Arg Tyr Glu Pro Gl - #u Val Gln Tyr Gln Met             65                 - # 70                 - # 75                 - # 80        - - ATC TTA AAT GGA GAA GAA ATC ATT CTC TCC CT - #A CAA AAA ACC AAG CAC           348                                                                        Ile Leu Asn Gly Glu Glu Ile Ile Leu Ser Le - #u Gln Lys Thr Lys His                             85 - #                 90 - #                 95               - - CTC CTG GGG CCA GAC TAC ACT GAA ACA TTG TA - #C TCA CCC AGA GGA GAG           396                                                                        Leu Leu Gly Pro Asp Tyr Thr Glu Thr Leu Ty - #r Ser Pro Arg Gly Glu                        100      - #           105      - #           110                   - - GAA ATT ACC ACG AAA CCT GAG AAC ATG GAA CA - #C TGT TAC TAT AAA GGA           444                                                                        Glu Ile Thr Thr Lys Pro Glu Asn Met Glu Hi - #s Cys Tyr Tyr Lys Gly                    115          - #       120          - #       125                       - - AAC ATC CTA AAT GAA AAG AAT TCT GTT GCC AG - #C ATC AGT ACT TGT GAC           492                                                                        Asn Ile Leu Asn Glu Lys Asn Ser Val Ala Se - #r Ile Ser Thr Cys Asp                130              - #   135              - #   140                           - - GGG TTG AGA GGA TAC TTC ACA CAT CAT CAC CA - #A AGA TAC CAG ATA AAA           540                                                                        Gly Leu Arg Gly Tyr Phe Thr His His His Gl - #n Arg Tyr Gln Ile Lys            145                 1 - #50                 1 - #55                 1 -       #60                                                                               - - CCT CTG AAA AGC ACA GAC GAG AAA GAA CAT GC - #C GTC TTT ACA TCT         AAC      588                                                                     Pro Leu Lys Ser Thr Asp Glu Lys Glu His Al - #a Val Phe Thr Ser Asn                           165  - #               170  - #               175               - - CAG GAG GAA CAA GAC CCA GCT AAC CAC ACA TG - #T GGT GTG AAG AGC ACT           636                                                                        Gln Glu Glu Gln Asp Pro Ala Asn His Thr Cy - #s Gly Val Lys Ser Thr                        180      - #           185      - #           190                   - - GAC GGG AAA CAA GGC CCA ATT CGA ATC TCT AG - #A TCA CTC AAA AGC CCA           684                                                                        Asp Gly Lys Gln Gly Pro Ile Arg Ile Ser Ar - #g Ser Leu Lys Ser Pro                    195          - #       200          - #       205                       - - GAG AAA GAA GAC TTT CTT CGG GCA CAG AAA TA - #C ATT GAT CTC TAT TTG           732                                                                        Glu Lys Glu Asp Phe Leu Arg Ala Gln Lys Ty - #r Ile Asp Leu Tyr Leu                210              - #   215              - #   220                           - - GTG CTG GAT AAT GCC TTT TAT AAG AAC TAT AA - #T GAG AAT CTA ACT CTG           780                                                                        Val Leu Asp Asn Ala Phe Tyr Lys Asn Tyr As - #n Glu Asn Leu Thr Leu            225                 2 - #30                 2 - #35                 2 -       #40                                                                               - - ATA AGA AGC TTT GTG TTT GAT GTG ATG AAC CT - #A CTC AAT GTG ATA         TAT      828                                                                     Ile Arg Ser Phe Val Phe Asp Val Met Asn Le - #u Leu Asn Val Ile Tyr                           245  - #               250  - #               255               - - AAC ACC ATA GAT GTT CAA GTG GCC TTG GTA GG - #T ATG GAA ATC TGG TCT           876                                                                        Asn Thr Ile Asp Val Gln Val Ala Leu Val Gl - #y Met Glu Ile Trp Ser                        260      - #           265      - #           270                   - - GAT GGG GAT AAG ATA AAG GTG GTG CCC AGC GC - #A AGC ACC ACG TTT GAC           924                                                                        Asp Gly Asp Lys Ile Lys Val Val Pro Ser Al - #a Ser Thr Thr Phe Asp                    275          - #       280          - #       285                       - - AAC TTC CTG AGA TGG CAC AGT TCT AAC CCG GG - #G AAA AAG ATC CAC GAC           972                                                                        Asn Phe Leu Arg Trp His Ser Ser Asn Pro Gl - #y Lys Lys Ile His Asp                290              - #   295              - #   300                           - - CAT GCT CAG CTT CTC AGC GGG ATT AGC TTC AA - #C AAT CGA CGT GTG GGA          1020                                                                        His Ala Gln Leu Leu Ser Gly Ile Ser Phe As - #n Asn Arg Arg Val Gly            305                 3 - #10                 3 - #15                 3 -       #20                                                                               - - CTG GCA GCT TCA AAT TCC TTG TGT TCC CCA TC - #T TCG GTT GCT GTT         ATT     1068                                                                     Leu Ala Ala Ser Asn Ser Leu Cys Ser Pro Se - #r Ser Val Ala Val Ile                           325  - #               330  - #               335               - - GAG GCT AAA AAA AAG AAT AAT GTG GCT CTT GT - #A GGA GTG ATG TCA CAT          1116                                                                        Glu Ala Lys Lys Lys Asn Asn Val Ala Leu Va - #l Gly Val Met Ser His                        340      - #           345      - #           350                   - - GAG CTG GGC CAT GTC CTT GGT ATG CCT GAT GT - #T CCA TTC AAC ACC AAG          1164                                                                        Glu Leu Gly His Val Leu Gly Met Pro Asp Va - #l Pro Phe Asn Thr Lys                    355          - #       360          - #       365                       - - TGT CCC TCT GGC AGT TGT GTG ATG AAT CAG TA - #T CTG AGT TCA AAA TTC          1212                                                                        Cys Pro Ser Gly Ser Cys Val Met Asn Gln Ty - #r Leu Ser Ser Lys Phe                370              - #   375              - #   380                           - - CCA AAG GAT TTC AGT ACA TCT TGC CGT GCA CA - #T TTT GAA AGA TAC CTT          1260                                                                        Pro Lys Asp Phe Ser Thr Ser Cys Arg Ala Hi - #s Phe Glu Arg Tyr Leu            385                 3 - #90                 3 - #95                 4 -       #00                                                                               - - TTA TCT CAG AAA CCA AAG TGC CTG CTG CAA GC - #A CCT ATT CCT ACA         AAT     1308                                                                     Leu Ser Gln Lys Pro Lys Cys Leu Leu Gln Al - #a Pro Ile Pro Thr Asn                           405  - #               410  - #               415               - - ATA ATG ACA ACA CCA GTG TGT GGG AAC CAC CT - #T CTA GAA GTG GGA GAA          1356                                                                        Ile Met Thr Thr Pro Val Cys Gly Asn His Le - #u Leu Glu Val Gly Glu                        420      - #           425      - #           430                   - - GAC TGT GAT TGT GGC TCT CCT AAG GAG TGT AC - #C AGT CTC TGC TGT GAA          1404                                                                        Asp Cys Asp Cys Gly Ser Pro Lys Glu Cys Th - #r Ser Leu Cys Cys Glu                    435          - #       440          - #       445                       - - GCC CTA ACG TGT AAA CTG AAG CCT GGA ACT GA - #T TGC GGA GGA GAT GCT          1452                                                                        Ala Leu Thr Cys Lys Leu Lys Pro Gly Thr As - #p Cys Gly Gly Asp Ala                450              - #   455              - #   460                           - - CCA AAC CAT ACC ACA GAG TGAATCCAAA GTCTGCTTCA CT - #GAGATGCT                 1500                                                                        Pro Asn His Thr Thr Glu                                                        465                 4 - #70                                                     - - ACCTTGCCAG GACAAGAACC AAGAACTCTA ACTGTCCCAG GAATCTTGTG AA -              #TTTTCACC   1560                                                                  - - CATAATGGTC TTTCACTTGT CATTCTACTT TCTATATTGT TATCAGTCCA GG -             #AAACAGGT   1620                                                                  - - AAACAGATGT AATTAGAGAC ATTGGCTCTT TGTTTAGGCC TAATCTTTCT TT -             #TTACTTTT   1680                                                                  - - TTTTTTCTTT TTTCTTTTTT TTTAAAGATC ATGAATTTGT GACTTAGTTC TG -             #CCCTTTGG   1740                                                                  - - AGAACAAAAG AAAGCAGTCT TCCATCAAAT CACCTTAAAA TGCACGGCTA AA -             #CTATTCAG   1800                                                                  - - AGTTAACACT CCAGAATTGT TAAATTACAA GTACTATGCT TTAATGCTTC TT -             #TCATCTTA   1860                                                                  - - CTAGTATGGC CTATAAAAAA AATAATACCA CTTGATGGGT GAAGGCTTTG GC -             #AATAGAAA   1920                                                                  - - GAAGAATAGA ATTCAGGTTT TATGTTATTC CTCTGTGTTC ACTTCGCCTT GC -             #TCTTGAAA   1980                                                                  - - GTGCAGTATT TTTCTACATC ATGTCGAGAA TGATTCAATG TAAATATTTT TC -             #ATTTTATC   2040                                                                  - - ATGTATATCC TATACACACA TCTCCTTCAT CATCATATAT GAAGTTTATT TT -             #GAGAAGTC   2100                                                                  - - TACATTGCTT ACATTTTAAT TGAGCCAGCA AAGAAGGCTT AATGATTTAT TG -             #AACCATAA   2160                                                                  - - TGTCAATAAA AACACAACTT TTGAGGCAAA AAAAAAAAAA AAAAAAAAAA AA -             #AAAAAAAA   2220                                                                  - - AAAAAAAAAA AAAAAAAAAA AAGAAAAAAA AAAAAAAAAA AAAAAAGACC TG -             #CCCGGGCG   2280                                                                  - -  - - (2) INFORMATION FOR SEQ ID NO:2:                                      - -      (i) SEQUENCE CHARACTERISTICS:                                                  (A) LENGTH: 470 amino - #acids                                                 (B) TYPE: amino acid                                                           (D) TOPOLOGY: linear                                                  - -     (ii) MOLECULE TYPE: protein                                            - -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:2:                                - - Met Leu Arg Gly Ile Ser Gln Leu Pro Ala Va - #l Ala Thr Met Ser         Trp                                                                                1               5 - #                 10 - #                 15              - - Val Leu Leu Pro Val Leu Trp Leu Ile Val Gl - #n Thr Gln Ala Ile Ala                    20     - #             25     - #             30                   - - Ile Lys Gln Thr Pro Glu Leu Thr Leu His Gl - #u Ile Val Cys Pro Lys                35         - #         40         - #         45                       - - Lys Leu His Ile Leu His Lys Arg Glu Ile Ly - #s Asn Asn Gln Thr Glu            50             - #     55             - #     60                           - - Lys His Gly Lys Glu Glu Arg Tyr Glu Pro Gl - #u Val Gln Tyr Gln Met        65                 - # 70                 - # 75                 - # 80        - - Ile Leu Asn Gly Glu Glu Ile Ile Leu Ser Le - #u Gln Lys Thr Lys His                        85 - #                 90 - #                 95               - - Leu Leu Gly Pro Asp Tyr Thr Glu Thr Leu Ty - #r Ser Pro Arg Gly Glu                   100      - #           105      - #           110                   - - Glu Ile Thr Thr Lys Pro Glu Asn Met Glu Hi - #s Cys Tyr Tyr Lys Gly               115          - #       120          - #       125                       - - Asn Ile Leu Asn Glu Lys Asn Ser Val Ala Se - #r Ile Ser Thr Cys Asp           130              - #   135              - #   140                           - - Gly Leu Arg Gly Tyr Phe Thr His His His Gl - #n Arg Tyr Gln Ile Lys       145                 1 - #50                 1 - #55                 1 -       #60                                                                               - - Pro Leu Lys Ser Thr Asp Glu Lys Glu His Al - #a Val Phe Thr Ser         Asn                                                                                              165  - #               170  - #               175              - - Gln Glu Glu Gln Asp Pro Ala Asn His Thr Cy - #s Gly Val Lys Ser Thr                   180      - #           185      - #           190                   - - Asp Gly Lys Gln Gly Pro Ile Arg Ile Ser Ar - #g Ser Leu Lys Ser Pro               195          - #       200          - #       205                       - - Glu Lys Glu Asp Phe Leu Arg Ala Gln Lys Ty - #r Ile Asp Leu Tyr Leu           210              - #   215              - #   220                           - - Val Leu Asp Asn Ala Phe Tyr Lys Asn Tyr As - #n Glu Asn Leu Thr Leu       225                 2 - #30                 2 - #35                 2 -       #40                                                                               - - Ile Arg Ser Phe Val Phe Asp Val Met Asn Le - #u Leu Asn Val Ile         Tyr                                                                                              245  - #               250  - #               255              - - Asn Thr Ile Asp Val Gln Val Ala Leu Val Gl - #y Met Glu Ile Trp Ser                   260      - #           265      - #           270                   - - Asp Gly Asp Lys Ile Lys Val Val Pro Ser Al - #a Ser Thr Thr Phe Asp               275          - #       280          - #       285                       - - Asn Phe Leu Arg Trp His Ser Ser Asn Pro Gl - #y Lys Lys Ile His Asp           290              - #   295              - #   300                           - - His Ala Gln Leu Leu Ser Gly Ile Ser Phe As - #n Asn Arg Arg Val Gly       305                 3 - #10                 3 - #15                 3 -       #20                                                                               - - Leu Ala Ala Ser Asn Ser Leu Cys Ser Pro Se - #r Ser Val Ala Val         Ile                                                                                              325  - #               330  - #               335              - - Glu Ala Lys Lys Lys Asn Asn Val Ala Leu Va - #l Gly Val Met Ser His                   340      - #           345      - #           350                   - - Glu Leu Gly His Val Leu Gly Met Pro Asp Va - #l Pro Phe Asn Thr Lys               355          - #       360          - #       365                       - - Cys Pro Ser Gly Ser Cys Val Met Asn Gln Ty - #r Leu Ser Ser Lys Phe           370              - #   375              - #   380                           - - Pro Lys Asp Phe Ser Thr Ser Cys Arg Ala Hi - #s Phe Glu Arg Tyr Leu       385                 3 - #90                 3 - #95                 4 -       #00                                                                               - - Leu Ser Gln Lys Pro Lys Cys Leu Leu Gln Al - #a Pro Ile Pro Thr         Asn                                                                                              405  - #               410  - #               415              - - Ile Met Thr Thr Pro Val Cys Gly Asn His Le - #u Leu Glu Val Gly Glu                   420      - #           425      - #           430                   - - Asp Cys Asp Cys Gly Ser Pro Lys Glu Cys Th - #r Ser Leu Cys Cys Glu               435          - #       440          - #       445                       - - Ala Leu Thr Cys Lys Leu Lys Pro Gly Thr As - #p Cys Gly Gly Asp Ala           450              - #   455              - #   460                           - - Pro Asn His Thr Thr Glu                                                   465                 4 - #70                                                     - -  - - (2) INFORMATION FOR SEQ ID NO:3:                                      - -      (i) SEQUENCE CHARACTERISTICS:                                                  (A) LENGTH: 1780 base - #pairs                                                 (B) TYPE: nucleic acid                                                         (C) STRANDEDNESS: single                                                       (D) TOPOLOGY: linear                                                  - -     (ii) MOLECULE TYPE: cDNA                                               - -     (ix) FEATURE:                                                                   (A) NAME/KEY: CDS                                                              (B) LOCATION: 66..1766                                                - -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:3:                                - - AGTGGAGAGG ACCGCGCTGT CCTGCTGTCA CCAAGAGCTG GAGACACCAT CT -              #CCCACCGA     60                                                                  - - GAGTC ATG GCC CCA TTG GCC CTG CAC CTC CTC - #GTC CTC GTC CCC ATC             107                                                                              Met Ala Pro Leu Ala Leu His - #Leu Leu Val Leu Val Pro Ile                       1          - #     5             - #     10                             - - CTC CTC AGC CTG GTG GCC TCC CAG GAC TGG AA - #G GCT GAA CGC AGC CAA           155                                                                        Leu Leu Ser Leu Val Ala Ser Gln Asp Trp Ly - #s Ala Glu Arg Ser Gln             15                 - # 20                 - # 25                 - # 30        - - GAC CCC TTC GAG AAA TGC ATG CAG GAT CCT GA - #C TAT GAG CAG CTG CTC           203                                                                        Asp Pro Phe Glu Lys Cys Met Gln Asp Pro As - #p Tyr Glu Gln Leu Leu                             35 - #                 40 - #                 45               - - AAG GTG GTG ACC TGG GGG CTC AAT CGG ACC CT - #G AAG CCC CAG AGG GTG           251                                                                        Lys Val Val Thr Trp Gly Leu Asn Arg Thr Le - #u Lys Pro Gln Arg Val                         50     - #             55     - #             60                   - - ATT GTG GTT GGC GCT GGT GTG GCC GGG CTG GT - #G GCC GCC AAG GTG CTC           299                                                                        Ile Val Val Gly Ala Gly Val Ala Gly Leu Va - #l Ala Ala Lys Val Leu                     65         - #         70         - #         75                       - - AGC GAT GCT GGA CAC AAG GTC ACC ATC CTG GA - #G GCA GAT AAC AGG ATC           347                                                                        Ser Asp Ala Gly His Lys Val Thr Ile Leu Gl - #u Ala Asp Asn Arg Ile                 80             - #     85             - #     90                           - - GGG GGC CGC ATC TTC ACC TAC CGG GAC CAG AA - #C ACG GGC TGG ATT GGG           395                                                                        Gly Gly Arg Ile Phe Thr Tyr Arg Asp Gln As - #n Thr Gly Trp Ile Gly             95                 - #100                 - #105                 - #110        - - GAG CTG GGA GCC ATG CGC ATG CCC AGC TCT CA - #C AGG ATC CTC CAC AAG           443                                                                        Glu Leu Gly Ala Met Arg Met Pro Ser Ser Hi - #s Arg Ile Leu His Lys                            115  - #               120  - #               125               - - CTC TGC CAG GGC CTG GGG CTC AAC CTG ACC AA - #G TTC ACC CAG TAC GAC           491                                                                        Leu Cys Gln Gly Leu Gly Leu Asn Leu Thr Ly - #s Phe Thr Gln Tyr Asp                        130      - #           135      - #           140                   - - AAG AAC ACG TGG ACG GAG GTG CAC GAA GTG AA - #G CTG CGC AAC TAT GTG           539                                                                        Lys Asn Thr Trp Thr Glu Val His Glu Val Ly - #s Leu Arg Asn Tyr Val                    145          - #       150          - #       155                       - - GTG GAG AAG GTG CCC GAG AAG CTG GGC TAC GC - #C TTG CGT CCC CAG GAA           587                                                                        Val Glu Lys Val Pro Glu Lys Leu Gly Tyr Al - #a Leu Arg Pro Gln Glu                160              - #   165              - #   170                           - - AAG GGC CAC TCG CCC GAA GAC ATC TAC CAG AT - #G GCT CTC AAC CAG GCC           635                                                                        Lys Gly His Ser Pro Glu Asp Ile Tyr Gln Me - #t Ala Leu Asn Gln Ala            175                 1 - #80                 1 - #85                 1 -       #90                                                                               - - CTC AAA GAC CTC AAG GCA CTG GGC TGC AGA AA - #G GCG ATG AAG AAG         TTT      683                                                                     Leu Lys Asp Leu Lys Ala Leu Gly Cys Arg Ly - #s Ala Met Lys Lys Phe                           195  - #               200  - #               205               - - GAA AGG CAC ACG CTC TTG GAA TAT CTT CTC GG - #G GAG GGG AAC CTG AGC           731                                                                        Glu Arg His Thr Leu Leu Glu Tyr Leu Leu Gl - #y Glu Gly Asn Leu Ser                        210      - #           215      - #           220                   - - CGG CCG GCC GTG CAG CTT CTG GGA GAC GTG AT - #G TCC GAG GAT GGC TTC           779                                                                        Arg Pro Ala Val Gln Leu Leu Gly Asp Val Me - #t Ser Glu Asp Gly Phe                    225          - #       230          - #       235                       - - TTC TAT CTC AGC TTC GCC GAG GCC CTC CGG GC - #C CAC AGC TGC CTC AGC           827                                                                        Phe Tyr Leu Ser Phe Ala Glu Ala Leu Arg Al - #a His Ser Cys Leu Ser                240              - #   245              - #   250                           - - GAC AGA CTC CAG TAC AGC CGC ATC GTG GGT GG - #C TGG GAC CTG CTG CCG           875                                                                        Asp Arg Leu Gln Tyr Ser Arg Ile Val Gly Gl - #y Trp Asp Leu Leu Pro            255                 2 - #60                 2 - #65                 2 -       #70                                                                               - - CGC GCG CTG CTG AGC TCG CTG TCC GGG CTT GT - #G CTG TTG AAC GCG         CCC      923                                                                     Arg Ala Leu Leu Ser Ser Leu Ser Gly Leu Va - #l Leu Leu Asn Ala Pro                           275  - #               280  - #               285               - - GTG GTG GCG ATG ACC CAG GGA CCG CAC GAT GT - #G CAC GTG CAG ATC GAG           971                                                                        Val Val Ala Met Thr Gln Gly Pro His Asp Va - #l His Val Gln Ile Glu                        290      - #           295      - #           300                   - - ACC TCT CCC CCG GCG CGG AAT CTG AAG GTG CT - #G AAG GCC GAC GTG GTG          1019                                                                        Thr Ser Pro Pro Ala Arg Asn Leu Lys Val Le - #u Lys Ala Asp Val Val                    305          - #       310          - #       315                       - - CTG CTG ACG GCG AGC GGA CCG GCG GTG AAG CG - #C ATC ACC TTC TCG CCG          1067                                                                        Leu Leu Thr Ala Ser Gly Pro Ala Val Lys Ar - #g Ile Thr Phe Ser Pro                320              - #   325              - #   330                           - - CCG CTG CCC CGC CAC ATG CAG GAG GCG CTG CG - #G AGG CTG CAC TAC GTG          1115                                                                        Pro Leu Pro Arg His Met Gln Glu Ala Leu Ar - #g Arg Leu His Tyr Val            335                 3 - #40                 3 - #45                 3 -       #50                                                                               - - CCG GCC ACC AAG GTG TTC CTA AGC TTC CGC AG - #G CCC TTC TGG CGC         GAG     1163                                                                     Pro Ala Thr Lys Val Phe Leu Ser Phe Arg Ar - #g Pro Phe Trp Arg Glu                           355  - #               360  - #               365               - - GAG CAC ATT GAA GGC GGC CAC TCA AAC ACC GA - #T CGC CCG TCG CGC ATG          1211                                                                        Glu His Ile Glu Gly Gly His Ser Asn Thr As - #p Arg Pro Ser Arg Met                        370      - #           375      - #           380                   - - ATT TTC TAC CCG CCG CCG CGC GAG GGC GCG CT - #G CTG CTG GCC TCG TAC          1259                                                                        Ile Phe Tyr Pro Pro Pro Arg Glu Gly Ala Le - #u Leu Leu Ala Ser Tyr                    385          - #       390          - #       395                       - - ACG TGG TCG GAC GCG GCG GCA GCG TTC GCC GG - #C TTG AGC CGG GAA GAG          1307                                                                        Thr Trp Ser Asp Ala Ala Ala Ala Phe Ala Gl - #y Leu Ser Arg Glu Glu                400              - #   405              - #   410                           - - GCG TTG CGC TTG GCG CTC GAC GAC GTG GCG GC - #A TTG CAC GGG CCT GTC          1355                                                                        Ala Leu Arg Leu Ala Leu Asp Asp Val Ala Al - #a Leu His Gly Pro Val            415                 4 - #20                 4 - #25                 4 -       #30                                                                               - - GTG CGC CAG CTC TGG GAC GGC ACC GGC GTC GT - #C AAG CGT TGG GCG         GAG     1403                                                                     Val Arg Gln Leu Trp Asp Gly Thr Gly Val Va - #l Lys Arg Trp Ala Glu                           435  - #               440  - #               445               - - GAC CAG CAC AGC CAG GGT GGC TTT GTG GTA CA - #G CCG CCG GCG CTC TGG          1451                                                                        Asp Gln His Ser Gln Gly Gly Phe Val Val Gl - #n Pro Pro Ala Leu Trp                        450      - #           455      - #           460                   - - CAA ACC GAA AAG GAT GAC TGG ACG GTC CCT TA - #T GGC CGC ATC TAC TTT          1499                                                                        Gln Thr Glu Lys Asp Asp Trp Thr Val Pro Ty - #r Gly Arg Ile Tyr Phe                    465          - #       470          - #       475                       - - GCC GGC GAG CAC ACC GCC TAC CCG CAC GGC TG - #G GTG GAG ACG GCG GTC          1547                                                                        Ala Gly Glu His Thr Ala Tyr Pro His Gly Tr - #p Val Glu Thr Ala Val                480              - #   485              - #   490                           - - AAG TCG GCG CTG CGC GCC GCC ATC AAG ATC AA - #C AGC CGG AAG GGG CCT          1595                                                                        Lys Ser Ala Leu Arg Ala Ala Ile Lys Ile As - #n Ser Arg Lys Gly Pro            495                 5 - #00                 5 - #05                 5 -       #10                                                                               - - GCA TCG GAC ACG GCC AGC CCC GAG GGG CAC GC - #A TCT GAC ATG GAG         GGG     1643                                                                     Ala Ser Asp Thr Ala Ser Pro Glu Gly His Al - #a Ser Asp Met Glu Gly                           515  - #               520  - #               525               - - CAG GGG CAT GTG CAT GGG GTG GCC AGC AGC CC - #C TCG CAT GAC CTG GCA          1691                                                                        Gln Gly His Val His Gly Val Ala Ser Ser Pr - #o Ser His Asp Leu Ala                        530      - #           535      - #           540                   - - AAG GAA GAA GGC AGC CAC CCT CCA GTC CAA GG - #C CAG TTA TCT CTC CAA          1739                                                                        Lys Glu Glu Gly Ser His Pro Pro Val Gln Gl - #y Gln Leu Ser Leu Gln                    545          - #       550          - #       555                       - - AAC ACG ACC CAC ACG AGG ACC TCG CAT TAAAGTATT - #T TCGG                     - # 1780                                                                     Asn Thr Thr His Thr Arg Thr Ser His                                                560              - #   565                                                  - -  - - (2) INFORMATION FOR SEQ ID NO:4:                                      - -      (i) SEQUENCE CHARACTERISTICS:                                                  (A) LENGTH: 567 amino - #acids                                                 (B) TYPE: amino acid                                                           (D) TOPOLOGY: linear                                                  - -     (ii) MOLECULE TYPE: protein                                            - -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:4:                                - - Met Ala Pro Leu Ala Leu His Leu Leu Val Le - #u Val Pro Ile Leu Leu         1               5 - #                 10 - #                 15               - - Ser Leu Val Ala Ser Gln Asp Trp Lys Ala Gl - #u Arg Ser Gln Asp Pro                    20     - #             25     - #             30                   - - Phe Glu Lys Cys Met Gln Asp Pro Asp Tyr Gl - #u Gln Leu Leu Lys Val                35         - #         40         - #         45                       - - Val Thr Trp Gly Leu Asn Arg Thr Leu Lys Pr - #o Gln Arg Val Ile Val            50             - #     55             - #     60                           - - Val Gly Ala Gly Val Ala Gly Leu Val Ala Al - #a Lys Val Leu Ser Asp        65                 - # 70                 - # 75                 - # 80        - - Ala Gly His Lys Val Thr Ile Leu Glu Ala As - #p Asn Arg Ile Gly Gly                        85 - #                 90 - #                 95               - - Arg Ile Phe Thr Tyr Arg Asp Gln Asn Thr Gl - #y Trp Ile Gly Glu Leu                   100      - #           105      - #           110                   - - Gly Ala Met Arg Met Pro Ser Ser His Arg Il - #e Leu His Lys Leu Cys               115          - #       120          - #       125                       - - Gln Gly Leu Gly Leu Asn Leu Thr Lys Phe Th - #r Gln Tyr Asp Lys Asn           130              - #   135              - #   140                           - - Thr Trp Thr Glu Val His Glu Val Lys Leu Ar - #g Asn Tyr Val Val Glu       145                 1 - #50                 1 - #55                 1 -       #60                                                                               - - Lys Val Pro Glu Lys Leu Gly Tyr Ala Leu Ar - #g Pro Gln Glu Lys         Gly                                                                                              165  - #               170  - #               175              - - His Ser Pro Glu Asp Ile Tyr Gln Met Ala Le - #u Asn Gln Ala Leu Lys                   180      - #           185      - #           190                   - - Asp Leu Lys Ala Leu Gly Cys Arg Lys Ala Me - #t Lys Lys Phe Glu Arg               195          - #       200          - #       205                       - - His Thr Leu Leu Glu Tyr Leu Leu Gly Glu Gl - #y Asn Leu Ser Arg Pro           210              - #   215              - #   220                           - - Ala Val Gln Leu Leu Gly Asp Val Met Ser Gl - #u Asp Gly Phe Phe Tyr       225                 2 - #30                 2 - #35                 2 -       #40                                                                               - - Leu Ser Phe Ala Glu Ala Leu Arg Ala His Se - #r Cys Leu Ser Asp         Arg                                                                                              245  - #               250  - #               255              - - Leu Gln Tyr Ser Arg Ile Val Gly Gly Trp As - #p Leu Leu Pro Arg Ala                   260      - #           265      - #           270                   - - Leu Leu Ser Ser Leu Ser Gly Leu Val Leu Le - #u Asn Ala Pro Val Val               275          - #       280          - #       285                       - - Ala Met Thr Gln Gly Pro His Asp Val His Va - #l Gln Ile Glu Thr Ser           290              - #   295              - #   300                           - - Pro Pro Ala Arg Asn Leu Lys Val Leu Lys Al - #a Asp Val Val Leu Leu       305                 3 - #10                 3 - #15                 3 -       #20                                                                               - - Thr Ala Ser Gly Pro Ala Val Lys Arg Ile Th - #r Phe Ser Pro Pro         Leu                                                                                              325  - #               330  - #               335              - - Pro Arg His Met Gln Glu Ala Leu Arg Arg Le - #u His Tyr Val Pro Ala                   340      - #           345      - #           350                   - - Thr Lys Val Phe Leu Ser Phe Arg Arg Pro Ph - #e Trp Arg Glu Glu His               355          - #       360          - #       365                       - - Ile Glu Gly Gly His Ser Asn Thr Asp Arg Pr - #o Ser Arg Met Ile Phe           370              - #   375              - #   380                           - - Tyr Pro Pro Pro Arg Glu Gly Ala Leu Leu Le - #u Ala Ser Tyr Thr Trp       385                 3 - #90                 3 - #95                 4 -       #00                                                                               - - Ser Asp Ala Ala Ala Ala Phe Ala Gly Leu Se - #r Arg Glu Glu Ala         Leu                                                                                              405  - #               410  - #               415              - - Arg Leu Ala Leu Asp Asp Val Ala Ala Leu Hi - #s Gly Pro Val Val Arg                   420      - #           425      - #           430                   - - Gln Leu Trp Asp Gly Thr Gly Val Val Lys Ar - #g Trp Ala Glu Asp Gln               435          - #       440          - #       445                       - - His Ser Gln Gly Gly Phe Val Val Gln Pro Pr - #o Ala Leu Trp Gln Thr           450              - #   455              - #   460                           - - Glu Lys Asp Asp Trp Thr Val Pro Tyr Gly Ar - #g Ile Tyr Phe Ala Gly       465                 4 - #70                 4 - #75                 4 -       #80                                                                               - - Glu His Thr Ala Tyr Pro His Gly Trp Val Gl - #u Thr Ala Val Lys         Ser                                                                                              485  - #               490  - #               495              - - Ala Leu Arg Ala Ala Ile Lys Ile Asn Ser Ar - #g Lys Gly Pro Ala Ser                   500      - #           505      - #           510                   - - Asp Thr Ala Ser Pro Glu Gly His Ala Ser As - #p Met Glu Gly Gln Gly               515          - #       520          - #       525                       - - His Val His Gly Val Ala Ser Ser Pro Ser Hi - #s Asp Leu Ala Lys Glu           530              - #   535              - #   540                           - - Glu Gly Ser His Pro Pro Val Gln Gly Gln Le - #u Ser Leu Gln Asn Thr       545                 5 - #50                 5 - #55                 5 -       #60                                                                               - - Thr His Thr Arg Thr Ser His                                                               565                                                             - -  - - (2) INFORMATION FOR SEQ ID NO:5:                                      - -      (i) SEQUENCE CHARACTERISTICS:                                                  (A) LENGTH: 2456 base - #pairs                                                 (B) TYPE: nucleic acid                                                         (C) STRANDEDNESS: single                                                       (D) TOPOLOGY: linear                                                  - -     (ii) MOLECULE TYPE: cDNA                                               - -     (ix) FEATURE:                                                                   (A) NAME/KEY: CDS                                                              (B) LOCATION: 69..1925                                                - -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:5:                                - - GGGTCGACCA CGCGTCCGAC CAGGTCGGGG CCGGGTTCCG GGTCGGGGAG CG -             #GCTCCGGG     60                                                                  - - CGGCAGCT ATG AGG CGG GAC GTG CGC ATC CTG TTA - #CTG GGC GAG GCC         CAG     110                                                                               Met Arg Arg Asp Val A - #rg Ile Leu Leu Leu Gly Glu Ala Gln                     1       - #        5          - #        10                          - - GTG GGG AAG ACG TCG CTG ATC CTG TCC CTG GT - #G GGC GAG GAG TTC CCC           158                                                                        Val Gly Lys Thr Ser Leu Ile Leu Ser Leu Va - #l Gly Glu Glu Phe Pro             15                 - # 20                 - # 25                 - # 30        - - GAG GAG GTC CCT CCC CGC GCG GAG GAG ATC AC - #G ATC CCC GCG GAC GTC           206                                                                        Glu Glu Val Pro Pro Arg Ala Glu Glu Ile Th - #r Ile Pro Ala Asp Val                             35 - #                 40 - #                 45               - - ACC CCG GAG AAG GTG CCC ACC CAC ATC GTG GA - #C TAC TCA GAA GCC GAG           254                                                                        Thr Pro Glu Lys Val Pro Thr His Ile Val As - #p Tyr Ser Glu Ala Glu                         50     - #             55     - #             60                   - - CAG ACG GAC GAG GAG CTG CGG GAG GAG ATC CA - #C AAG GCA AAC GTG GTG           302                                                                        Gln Thr Asp Glu Glu Leu Arg Glu Glu Ile Hi - #s Lys Ala Asn Val Val                     65         - #         70         - #         75                       - - TGT GTG GTG TAT GAC GTC TCT GAG GAG GCC AC - #C ATT GAG AAG ATT CGA           350                                                                        Cys Val Val Tyr Asp Val Ser Glu Glu Ala Th - #r Ile Glu Lys Ile Arg                 80             - #     85             - #     90                           - - ACT AAG TGG ATC CCA CTG GTG AAT GGG GGG AC - #C ACG CAG GGG CCC AGG           398                                                                        Thr Lys Trp Ile Pro Leu Val Asn Gly Gly Th - #r Thr Gln Gly Pro Arg             95                 - #100                 - #105                 - #110        - - GTG CCC ATC ATC CTA GTG GGC AAC AAG TCA GA - #C CTG CGG TCG GGG AGC           446                                                                        Val Pro Ile Ile Leu Val Gly Asn Lys Ser As - #p Leu Arg Ser Gly Ser                            115  - #               120  - #               125               - - TCC ATG GAG GCC GTG CTC CCC ATC ATG AGC CA - #G TTT CCC GAG ATT GAG           494                                                                        Ser Met Glu Ala Val Leu Pro Ile Met Ser Gl - #n Phe Pro Glu Ile Glu                        130      - #           135      - #           140                   - - ACC TGC GTG GAG TGT TCG GCC AAG AAC CTG AG - #G AAC ATC TCA GAG CTG           542                                                                        Thr Cys Val Glu Cys Ser Ala Lys Asn Leu Ar - #g Asn Ile Ser Glu Leu                    145          - #       150          - #       155                       - - TTC TAC TAC GCC CAG AAG GCC GTC CTG CAT CC - #C ACA GCC CCC CTC TAT           590                                                                        Phe Tyr Tyr Ala Gln Lys Ala Val Leu His Pr - #o Thr Ala Pro Leu Tyr                160              - #   165              - #   170                           - - GAC CCT GAG GCC AAG CAG TTG AGG CCC GCG TG - #C GCC CAG GCG CTG ACG           638                                                                        Asp Pro Glu Ala Lys Gln Leu Arg Pro Ala Cy - #s Ala Gln Ala Leu Thr            175                 1 - #80                 1 - #85                 1 -       #90                                                                               - - CGC ATC TTC AGG CTC TCA GAT CAG GAC CTG GA - #C CAG GCG CTC AGT         GAC      686                                                                     Arg Ile Phe Arg Leu Ser Asp Gln Asp Leu As - #p Gln Ala Leu Ser Asp                           195  - #               200  - #               205               - - GAA GAG CTC AAC GCT TTC CAG CAG AAA TCC TG - #C TTT GGG CAC CCC CTG           734                                                                        Glu Glu Leu Asn Ala Phe Gln Gln Lys Ser Cy - #s Phe Gly His Pro Leu                        210      - #           215      - #           220                   - - GCC CCG CAG GCC CTG GAG GAC GTG AAG ACG GT - #G GTG TGC AGG AAC GTG           782                                                                        Ala Pro Gln Ala Leu Glu Asp Val Lys Thr Va - #l Val Cys Arg Asn Val                    225          - #       230          - #       235                       - - GCG GGC GGC GTG CGG GAG GAC CGG CTG ACC CT - #G GAT GGT TTC CTC TTC           830                                                                        Ala Gly Gly Val Arg Glu Asp Arg Leu Thr Le - #u Asp Gly Phe Leu Phe                240              - #   245              - #   250                           - - CTG AAC ACG CTC TTC ATC CAG CGC GGC CGG CA - #C GAG ACC ACC TGG ACC           878                                                                        Leu Asn Thr Leu Phe Ile Gln Arg Gly Arg Hi - #s Glu Thr Thr Trp Thr            255                 2 - #60                 2 - #65                 2 -       #70                                                                               - - ATC CTG CGG CGC TTC GGC TAC AGC GAT GCC CT - #G GAG CTG ACT GCG         GAC      926                                                                     Ile Leu Arg Arg Phe Gly Tyr Ser Asp Ala Le - #u Glu Leu Thr Ala Asp                           275  - #               280  - #               285               - - TAT CTC TCC CCT CTG ATC CAC GTG CCC CCC GG - #C TGC AGC ACG GAG CTC           974                                                                        Tyr Leu Ser Pro Leu Ile His Val Pro Pro Gl - #y Cys Ser Thr Glu Leu                        290      - #           295      - #           300                   - - AAC CAC CTT GGC TAC CAG TTT GTG CAG AGA GT - #G TTT GAG AAG CAC GAC          1022                                                                        Asn His Leu Gly Tyr Gln Phe Val Gln Arg Va - #l Phe Glu Lys His Asp                    305          - #       310          - #       315                       - - CAG GAC CGC GAC GGC GCC CTC TCG CCC GTG GA - #G CTG CAA AGC CTT TTC          1070                                                                        Gln Asp Arg Asp Gly Ala Leu Ser Pro Val Gl - #u Leu Gln Ser Leu Phe                320              - #   325              - #   330                           - - AGT GTG TTC CCA GCA GCG CCC TGG GGC CCC GA - #G CTC CCA CGC ACA GTC          1118                                                                        Ser Val Phe Pro Ala Ala Pro Trp Gly Pro Gl - #u Leu Pro Arg Thr Val            335                 3 - #40                 3 - #45                 3 -       #50                                                                               - - CGC ACA GAG GCC GGC CGG TTG CCC CTG CAC GG - #A TAC CTC TGC CAG         TGG     1166                                                                     Arg Thr Glu Ala Gly Arg Leu Pro Leu His Gl - #y Tyr Leu Cys Gln Trp                           355  - #               360  - #               365               - - ACC CTG GTG ACC TAC CTG GAC GTC CGG AGC TG - #C CTT GGA CAC CTA GGC          1214                                                                        Thr Leu Val Thr Tyr Leu Asp Val Arg Ser Cy - #s Leu Gly His Leu Gly                        370      - #           375      - #           380                   - - TAC CTG GGC TAC CCC ACC CTC TGT GAG CAG GA - #C CAG GCC CAT GCC ATC          1262                                                                        Tyr Leu Gly Tyr Pro Thr Leu Cys Glu Gln As - #p Gln Ala His Ala Ile                    385          - #       390          - #       395                       - - ACA GTC ACT CGT GAG AAG AGG CTG GAC CAG GA - #G AAG GGA CAG ACG CAG          1310                                                                        Thr Val Thr Arg Glu Lys Arg Leu Asp Gln Gl - #u Lys Gly Gln Thr Gln                400              - #   405              - #   410                           - - TGG AGC GTC CTC CTG TGC AAG GTG GTA GGG GC - #C CGT GGA GTG GGC AAG          1358                                                                        Trp Ser Val Leu Leu Cys Lys Val Val Gly Al - #a Arg Gly Val Gly Lys            415                 4 - #20                 4 - #25                 4 -       #30                                                                               - - TCT GCC TTC CTG CAG GCC TTT CTC GGC CGC GG - #C CTG GGG CAC CAG         GAC     1406                                                                     Ser Ala Phe Leu Gln Ala Phe Leu Gly Arg Gl - #y Leu Gly His Gln Asp                           435  - #               440  - #               445               - - ACG AGG GAG CAG CCT CCC GGC TAC GCC ATC GA - #C ACG GTG CAG GTC AAT          1454                                                                        Thr Arg Glu Gln Pro Pro Gly Tyr Ala Ile As - #p Thr Val Gln Val Asn                        450      - #           455      - #           460                   - - GGA CAG GAG AAG TAC TTG ATC CTC TGT GAG GT - #G GGC ACA GAT GGT CTG          1502                                                                        Gly Gln Glu Lys Tyr Leu Ile Leu Cys Glu Va - #l Gly Thr Asp Gly Leu                    465          - #       470          - #       475                       - - CTG GCC ACA TCG CTG GAC GCC ACC TGT GAC GT - #T GCC TGC TTG ATG TTT          1550                                                                        Leu Ala Thr Ser Leu Asp Ala Thr Cys Asp Va - #l Ala Cys Leu Met Phe                480              - #   485              - #   490                           - - GAT GGC AGT GAC CCA AAG TCC TTT GCA CAT TG - #T GCC AGC GTC TAC AAG          1598                                                                        Asp Gly Ser Asp Pro Lys Ser Phe Ala His Cy - #s Ala Ser Val Tyr Lys            495                 5 - #00                 5 - #05                 5 -       #10                                                                               - - CAC CAT TAC ATG GAC GGG CAG ACC CCC TGC CT - #C TTT GTC TCC TCC         AAG     1646                                                                     His His Tyr Met Asp Gly Gln Thr Pro Cys Le - #u Phe Val Ser Ser Lys                           515  - #               520  - #               525               - - GCC GAC CTG CCC GAA GGT GTC GCG GTG TCT GG - #C CCA TCA CCG GCC GAG          1694                                                                        Ala Asp Leu Pro Glu Gly Val Ala Val Ser Gl - #y Pro Ser Pro Ala Glu                        530      - #           535      - #           540                   - - TTT TGC CGC AAG CAC CGG CTA CCC GCT CCC GT - #G CCG TTC TCC TGT GCT          1742                                                                        Phe Cys Arg Lys His Arg Leu Pro Ala Pro Va - #l Pro Phe Ser Cys Ala                    545          - #       550          - #       555                       - - GGC CCA GCC GAG CCC AGC ACC ACC ATC TTC AC - #C CAG CTC GCC ACC ATG          1790                                                                        Gly Pro Ala Glu Pro Ser Thr Thr Ile Phe Th - #r Gln Leu Ala Thr Met                560              - #   565              - #   570                           - - GCC GCC TTC CCA CAT TTG GTC CAC GCA GAG CT - #G CAT CCC TCT TCC TTC          1838                                                                        Ala Ala Phe Pro His Leu Val His Ala Glu Le - #u His Pro Ser Ser Phe            575                 5 - #80                 5 - #85                 5 -       #90                                                                               - - TGG CTC CGG GGG CTG CTG GGG GTT GTC GGG GC - #C GCC GTG GCC GCA         GTC     1886                                                                     Trp Leu Arg Gly Leu Leu Gly Val Val Gly Al - #a Ala Val Ala Ala Val                           595  - #               600  - #               605               - - CTC AGC TTC TCA CTC TAC AGG GTC CTG GTG AA - #G AGC CAG TGAGGCCCCT           1935                                                                        Leu Ser Phe Ser Leu Tyr Arg Val Leu Val Ly - #s Ser Gln                                    610      - #           615                                          - - GGTACCCAAG CCCCCTCCCC TGACCTGGGT GTGCCTCGCT GCTGGGGCTC TG -              #CACTTTTT   1995                                                                  - - GTTTCTGAAG GCAGTCGATC TGCAGCGGGG CCTTATGCTG CCATGCACTG CC -             #CTGGCTCC   2055                                                                  - - TGCCGGACCC CCAGGGTGGG CCGTGGCAGG TGGCTGAGCA GGAGCTCCCA AG -             #TGCCGGCC   2115                                                                  - - ACCGCTGTCA GGGATTGCCC ACCCCTGGGC ATCATGTGTG TGGGGCCGGG GA -             #GCACAGGT   2175                                                                  - - GTGGGAGCTG GTGACCCCAG ACCCAGAATT CTCAGGGCTC TACCCCCCTT TC -             #CTGGTCCT   2235                                                                  - - AGGTGGCCAG TGGGTATGAG GAGGGCTGGA AGGCAGAGCT TTGGGCCAAA AG -             #CAGGCGTT   2295                                                                  - - GGGGGGTCCC CCCTCAAGTT TGGAGCCGTT TCCGTGGTTG TAGCAGAGGA CC -             #GGAGGTTG   2355                                                                  - - GGTTCCTGAT TAAACTTCAC TGTGTGTTTT CTATCTCGGA TCCCAGTCTC TG -             #AAGACAAC   2415                                                                  - - TTGCTTTGAT TCAACCTAAA AAAAAAAAAA AAAAAAAAAA A    - #                       - # 2456                                                                      - -  - - (2) INFORMATION FOR SEQ ID NO:6:                                      - -      (i) SEQUENCE CHARACTERISTICS:                                                  (A) LENGTH: 619 amino - #acids                                                 (B) TYPE: amino acid                                                           (D) TOPOLOGY: linear                                                  - -     (ii) MOLECULE TYPE: protein                                            - -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:6:                                - - Met Arg Arg Asp Val Arg Ile Leu Leu Leu Gl - #y Glu Ala Gln Val Gly         1               5 - #                 10 - #                 15               - - Lys Thr Ser Leu Ile Leu Ser Leu Val Gly Gl - #u Glu Phe Pro Glu Glu                    20     - #             25     - #             30                   - - Val Pro Pro Arg Ala Glu Glu Ile Thr Ile Pr - #o Ala Asp Val Thr Pro                35         - #         40         - #         45                       - - Glu Lys Val Pro Thr His Ile Val Asp Tyr Se - #r Glu Ala Glu Gln Thr            50             - #     55             - #     60                           - - Asp Glu Glu Leu Arg Glu Glu Ile His Lys Al - #a Asn Val Val Cys Val        65                 - # 70                 - # 75                 - # 80        - - Val Tyr Asp Val Ser Glu Glu Ala Thr Ile Gl - #u Lys Ile Arg Thr Lys                        85 - #                 90 - #                 95               - - Trp Ile Pro Leu Val Asn Gly Gly Thr Thr Gl - #n Gly Pro Arg Val Pro                   100      - #           105      - #           110                   - - Ile Ile Leu Val Gly Asn Lys Ser Asp Leu Ar - #g Ser Gly Ser Ser Met               115          - #       120          - #       125                       - - Glu Ala Val Leu Pro Ile Met Ser Gln Phe Pr - #o Glu Ile Glu Thr Cys           130              - #   135              - #   140                           - - Val Glu Cys Ser Ala Lys Asn Leu Arg Asn Il - #e Ser Glu Leu Phe Tyr       145                 1 - #50                 1 - #55                 1 -       #60                                                                               - - Tyr Ala Gln Lys Ala Val Leu His Pro Thr Al - #a Pro Leu Tyr Asp         Pro                                                                                              165  - #               170  - #               175              - - Glu Ala Lys Gln Leu Arg Pro Ala Cys Ala Gl - #n Ala Leu Thr Arg Ile                   180      - #           185      - #           190                   - - Phe Arg Leu Ser Asp Gln Asp Leu Asp Gln Al - #a Leu Ser Asp Glu Glu               195          - #       200          - #       205                       - - Leu Asn Ala Phe Gln Gln Lys Ser Cys Phe Gl - #y His Pro Leu Ala Pro           210              - #   215              - #   220                           - - Gln Ala Leu Glu Asp Val Lys Thr Val Val Cy - #s Arg Asn Val Ala Gly       225                 2 - #30                 2 - #35                 2 -       #40                                                                               - - Gly Val Arg Glu Asp Arg Leu Thr Leu Asp Gl - #y Phe Leu Phe Leu         Asn                                                                                              245  - #               250  - #               255              - - Thr Leu Phe Ile Gln Arg Gly Arg His Glu Th - #r Thr Trp Thr Ile Leu                   260      - #           265      - #           270                   - - Arg Arg Phe Gly Tyr Ser Asp Ala Leu Glu Le - #u Thr Ala Asp Tyr Leu               275          - #       280          - #       285                       - - Ser Pro Leu Ile His Val Pro Pro Gly Cys Se - #r Thr Glu Leu Asn His           290              - #   295              - #   300                           - - Leu Gly Tyr Gln Phe Val Gln Arg Val Phe Gl - #u Lys His Asp Gln Asp       305                 3 - #10                 3 - #15                 3 -       #20                                                                               - - Arg Asp Gly Ala Leu Ser Pro Val Glu Leu Gl - #n Ser Leu Phe Ser         Val                                                                                              325  - #               330  - #               335              - - Phe Pro Ala Ala Pro Trp Gly Pro Glu Leu Pr - #o Arg Thr Val Arg Thr                   340      - #           345      - #           350                   - - Glu Ala Gly Arg Leu Pro Leu His Gly Tyr Le - #u Cys Gln Trp Thr Leu               355          - #       360          - #       365                       - - Val Thr Tyr Leu Asp Val Arg Ser Cys Leu Gl - #y His Leu Gly Tyr Leu           370              - #   375              - #   380                           - - Gly Tyr Pro Thr Leu Cys Glu Gln Asp Gln Al - #a His Ala Ile Thr Val       385                 3 - #90                 3 - #95                 4 -       #00                                                                               - - Thr Arg Glu Lys Arg Leu Asp Gln Glu Lys Gl - #y Gln Thr Gln Trp         Ser                                                                                              405  - #               410  - #               415              - - Val Leu Leu Cys Lys Val Val Gly Ala Arg Gl - #y Val Gly Lys Ser Ala                   420      - #           425      - #           430                   - - Phe Leu Gln Ala Phe Leu Gly Arg Gly Leu Gl - #y His Gln Asp Thr Arg               435          - #       440          - #       445                       - - Glu Gln Pro Pro Gly Tyr Ala Ile Asp Thr Va - #l Gln Val Asn Gly Gln           450              - #   455              - #   460                           - - Glu Lys Tyr Leu Ile Leu Cys Glu Val Gly Th - #r Asp Gly Leu Leu Ala       465                 4 - #70                 4 - #75                 4 -       #80                                                                               - - Thr Ser Leu Asp Ala Thr Cys Asp Val Ala Cy - #s Leu Met Phe Asp         Gly                                                                                              485  - #               490  - #               495              - - Ser Asp Pro Lys Ser Phe Ala His Cys Ala Se - #r Val Tyr Lys His His                   500      - #           505      - #           510                   - - Tyr Met Asp Gly Gln Thr Pro Cys Leu Phe Va - #l Ser Ser Lys Ala Asp               515          - #       520          - #       525                       - - Leu Pro Glu Gly Val Ala Val Ser Gly Pro Se - #r Pro Ala Glu Phe Cys           530              - #   535              - #   540                           - - Arg Lys His Arg Leu Pro Ala Pro Val Pro Ph - #e Ser Cys Ala Gly Pro       545                 5 - #50                 5 - #55                 5 -       #60                                                                               - - Ala Glu Pro Ser Thr Thr Ile Phe Thr Gln Le - #u Ala Thr Met Ala         Ala                                                                                              565  - #               570  - #               575              - - Phe Pro His Leu Val His Ala Glu Leu His Pr - #o Ser Ser Phe Trp Leu                   580      - #           585      - #           590                   - - Arg Gly Leu Leu Gly Val Val Gly Ala Ala Va - #l Ala Ala Val Leu Ser               595          - #       600          - #       605                       - - Phe Ser Leu Tyr Arg Val Leu Val Lys Ser Gl - #n                               610              - #   615                                                __________________________________________________________________________ 

What is claimed is:
 1. A recombinant or isolated nucleic acid which comprises sequence encoding at least 12 contiguous amino acids of a primate YTF03 protein.
 2. The nucleic acid of claim 1 wherein said 12 amino acids are from primate YTF03 protein, and said nucleic acid further:a) encodes at least 12 contiguous amino acids from asp23 to his567 of b) SEQ ID NO: 4; or c) comprises at least 39 contiguous nucleotides from nucleotides 132 to 1766 of SEQ ID NO:
 3. 3. The nucleic acid of claim 1 wherein said 12 amino acids are from primate YTF03 protein, and said nucleic acid further:a) comprises sequence made by a synthetic method; b) is detectably labeled; c) is attached to a solid substrate; d) is coupled to another chemical moiety; or e) is a PCR product.
 4. The nucleic acid of claim 1 wherein said 12 amino adds are from primate YTF03 protein, and said nucleic acid further:a) is fused to another nucleic acid segment; or b) is operably associated with promoter, ribosome binding site, or poly-A addition site.
 5. The nucleic acid of claim 1 wherein said 12 amino acids are from primate YTF03 protein, and said nucleic acid further:a) is transformed into a cell, including a bacterial cell; or b) is in a sterile composition.
 6. The nucleic acid of claim 1 wherein said 12 amino adds are from primate YTF03 protein, and said nucleic acid further:a) is from human; b) is capable of selectively hybridizing to a nucleic acid encoding a YTF03 protein; c) comprises a natural sequence; or d) encodes an oxidoreductive active YTF03.
 7. The nucleic acid of claim 1 wherein said 12 amino acids are from primate YTF03 protein, and said nucleic acid further is an expression vector.
 8. A method comprising:a) contacting a biological sample with a first nucleic acid of claim 1 which selectively hybridizes to a target complementary nucleic acid; b) incubating said first nucleic acid with said biological sample to form a hybrid of said first nucleic acid with said target complementary nucleic acid sequence present in said biological sample; and c) detecting hybridization of said first nucleic acid to said target complementary nucleic acid sequence.
 9. The method of claim 8, wherein said first nucleic acid is capable of hybridizing to the coding portion of a nucleic acid of SEQ ID NO:
 4. 10. A method of producing a recombinant protein comprising transforming a host cell with said nucleic acid of claim 1 and culturing said cell to produce said recombinant protein.
 11. A kit comprising said nucleic acid of claim 1 and:a) instructional material for the use of said nucleic acid; or b) a compartment into which said nucleic acid is sequestered.
 12. A cell transfected with said nucleic acid of claim
 1. 13. A method of replicating a nucleic acid comprising culturing a cell of claim 12 in a culture medium, thereby replicating said nucleic acid.
 14. The recombinant nucleic acid of claim 1, wherein said primate YTF03 protein has mature sequence from amino residue asp23 to his567 of SEQ ID NO:
 4. 15. The nucleic acid of claim 1, wherein said 12 amino acids are from primate YTF03 protein, and said nucleic acid further:a) hybridizes to the mature coding portion of SEQ ID NO: 3 under stringent wash conditions of at least 45° C. and less than about 150 mM salt; or b) encodes a polypeptide which selectively binds a polyclonal antibody generated against the mature polypeptide from SEQ ID NO:
 4. 16. The nucleic acid of claim 15, wherein said nucleic acid hybridizes to he mature coding portion of SEQ ID NO: 3 under stringent wash conditions of at least 50° C. and less than about 150 mM salt.
 17. The nucleic acid of claim 1, wherein said 12 amino acids are from primate YTF03 protein, and said nucleic acid comprises at least 50 contiguous nucleotides from nucleotides 132 to 1766 of SEQ ID NO:
 3. 18. The recombinant nucleic acid of claim 1, which comprises the mature protein coding segment from SEQ ID NO:
 3. 19. The recombinant nucleic acid of claim 1, which encodes the mature polypeptide from SEQ ID NO:
 4. 20. The nucleic acid of claim 1, wherein said contiguous amino acids number at least 20 amino acids from SEQ ID NO:
 4. 21. The nucleic acid of claim 20, wherein said contiguous amino acids number at least 28 amino acids.
 22. A recombinant or isolated nucleic acid which comprises sequence encoding at least 12 contiguous amino acids of a primate APD08 protein.
 23. The nucleic acid of claim 22 wherein said 12 amino acids are from primate APD08 protein, and said nucleic acid further:a) encodes at least 12 contiguous amino acids from met1 to gln619 of SEQ ID NO: 6; or b) comprises at least 39 contiguous nucleotides from nucleotides 69 to 1925 of SEQ ID NO:
 5. 24. The nucleic acid of claim 22 wherein said 12 amino acids are from primate APD08 protein, and said nucleic acid further:a) comprises sequence made by a synthetic method; b) is detectably labeled; c) is attached to a solid substrate; d) is coupled to another chemical moiety; or e) is a PCR product.
 25. The nucleic acid of claim 22 wherein said 12 amino acids are from primate APD08 protein, and said nucleic acid further:a) is fused to another nucleic acid segment; or b) is operably associated with promoter, ribosome binding site, or poly-A addition site.
 26. The nucleic acid of claim 22 wherein said 12 amino acids are from primate APD08 protein, and said nucleic acid further:a) is transformed into a cell, including a bacterial cell; or b) is in a sterile composition.
 27. The nucleic acid of claim 22 wherein said 12 amino acids are from primate APD08 protein, and said nucleic acid further:a) is from human; b) is capable of selectively hybridizing to a nucleic acid encoding an APD08 protein; or c) comprises a natural sequence.
 28. The nucleic acid of claim 22 wherein said 12 amino acids are from primate APD08 protein, and said nucleic acid further is an expression vector.
 29. A method comprising:a) contacting a biological sample with a first nucleic acid of claim 22 which selectively hybridizes to a target complementary nucleic acid; b) incubating said first nucleic acid with said biological sample to form a hybrid of said first nucleic acid with said target complementary nucleic acid sequence present in said biological sample; and c) detecting hybridization of said first nucleic acid to said target complementary nucleic acid sequence.
 30. The method of claim 29, wherein said first nucleic acid is capable of hybridizing to the coding portion of a nucleic add of SEQ ID NO:
 6. 31. A method of producing a recombinant protein comprising transforming a host cell with said nucleic acid of claim 22 and culturing said cell to produce said recombinant protein.
 32. A kit comprising said nucleic acid of claim 22 and:a) instructional material for the use of said nucleic add; or b) a compartment into which said nucleic acid is sequestered.
 33. A cell transfected with said nucleic acid of claim
 22. 34. A method of replicating a nucleic acid comprising culturing a cell of claim 33 in a culture medium, thereby replicating said nucleic acid.
 35. The recombinant nucleic acid of claim 22, wherein said primate APD08 protein has sequence of SEQ ID NO:
 6. 36. The nucleic acid of claim 22, wherein said 12 amino acids are from primate APD08 protein, and said nucleic acid further:a) hybridizes to the mature coding portion of SEQ ID NO: 5 under stringent wash conditions of at least 45° C. and less than about 150 mM salt; or b) encodes a polypeptide which selectively binds a polydonal antibody generated against the mature polypeptide from SEQ ID NO:
 6. 37. The nucleic acid of claim 36, wherein said nucleic acid hybridizes to the mature coding portion of SEQ ID NO: 5 under stringent wash conditions of at least 50° C. and less than about 150 mM salt.
 38. The nucleic acid of claim 22, wherein said 12 amino acids are from primate APD08 protein, and said nucleic acid comprises at least 50 contiguous nucleotides from nucleotides 69 to 1925 of SEQ ID NO:
 5. 39. The recombinant nucleic acid of claim 22, which comprises the mature protein coding segment from SEQ ID NO:
 5. 40. The recombinant nucleic acid of claim 22, which encodes the mature polypeptide from SEQ ID NO:
 6. 41. The nucleic acid of claim 22, wherein said contiguous amino acids number at least 20 amino acids from SEQ ID NO:
 6. 42. The nucleic acid of claim 41, wherein said contiguous amino acids number at least 28 amino acids. 